The text comes from the first edition of 1828. The paragraph numbers and notes are my own.
 In the year 1783, just at the close of the revolution,° I published an elementary book for facilitating the acquisition of our vernacular tongue, and for correcting a vicious° pronunciation, which prevailed extensively among the common people of this country. Soon after the publication of that work, I believe in the following year, that learned and respectable scholar, the Rev. Dr. Goodrich of Durham, one of the trustees of Yale College, suggested to me, the propriety and expediency of my compiling a dictionary, which should complete a system for the instruction of the citizens of this country in the language. At that time, I could not indulge the thought, much less the hope, of undertaking such a work; as I was neither qualified by research, nor had I the means of support, during the execution of the work, had I been disposed to undertake it. For many years therefore, though I considered such a work as very desirable, yet it appeared to me impracticable; as I was under the necessity of devoting my time to other occupations for obtaining subsistence.°
|revolution, U.S. War of Independence
vicious = degraded
subsistence = support
 About twenty seven years ago, I began to think of attempting the compilation of a Dictionary. I was induced to this undertaking, not more by the suggestion of friends, than by my own experience of the want of such a work, while reading modern books of science. In this pursuit, I found almost insuperable° difficulties, from the want of a dictionary, for explaining many new words, which recent discoveries in the physical sciences had introduced into use. To remedy this defect in part, I published my Compendious Dictionary in 1806; and soon after made preparations for undertaking a larger work.
|insuperable = insurmountable
 My original design did not extend to an investigation of the origin and progress of our language; much less of other languages. I limited my views to the correcting of certain errors in the best English Dictionaries, and to the supplying of words in which they are deficient. But after writing through two letters of the alphabet, I determined to change my plan. I found myself embarrassed, at every step, for want° of a knowledge of the origin of words, which Johnson,° Bailey,° Junius,° Skinner° and some other authors do not afford the means of obtaining. Then laying aside my manuscripts, and all books treating of language, except lexicons and dictionaries, I endeavored, by a diligent comparison of words, having the same or cognate° radical° letters, in about twenty languages, to obtain a more correct knowledge of the primary sense of original words, of the affinities between the English and many other languages, and thus to enable myself to trace words to their source.
|want = lack
Samuel Johnson, lexicographer
Nathan Bailey, lexicographer
Franciscus Junius, etymologist
Stephen Skinner, etymologist
cognate = born together
radical = root
 I had not pursued this course more than three or four years, before I discovered that I had to unlearn a great deal that I had spent years in learning, and that it was necessary for me to go back to the first rudiments of a branch of erudition,° which I had before cultivated, as I had supposed, with success.
|erudition = study
 I spent ten years in this comparison of radical° words, and in forming a synopsis° of the principal words in twenty languages, arranged in classes, under their primary elements or letters. The result has been to open what are to me new views of language, and to unfold what appear to be the genuine principles on which these languages are constructed.
|radical = root
synopsis = systematic overview
 After completing this synopsis, I proceeded to correct what I had written of the Dictionary, and to complete the remaining part of the work. But before I had finished it, I determined on a voyage to Europe, with the view of obtaining some books and some assistance which I wanted; of learning the real state of the pronunciation of our language in England, as well as the general state of philology° in that country; and of attempting to bring about some agreement or coincidence of opinions, in regard to unsettled points in pronunciation and grammatical construction. In some of these objects I failed; in others, my designs were answered.
|philology = history of the language
 It is not only important, but, in a degree necessary, that the people of this country, should have an American Dictionary of the English Language; for, although the body of the language is the same as in England, and it is desirable to perpetuate that sameness, yet some differences must exist. Language is the expression of ideas; and if the people of one country cannot preserve an identity of ideas, they cannot retain an identity of language. Now an identity of ideas depends materially upon a sameness of things or objects with which the people of the two countries are conversant. But in no two portions of the earth, remote from each other, can such identity be found. Even physical objects must be different. But the principal differences between the people of this country and of all others, arise from different forms of government, different laws, institutions and customs. Thus the practice of hawking and hunting, the institution of heraldry,° and the feudal system of England originated terms which formed, and some of which now form, a necessary part of the language of that country; but, in the United States, many of these terms are no part of our present language, — and they cannot be, for the things which they express do not exist in this country. They can be known to us only as obsolete or as foreign words. On the other hand, the institutions in this country which are new and peculiar, give rise to new terms or to new applications of old terms, unknown to the people of England; which cannot be explained by them and which will not be inserted in their dictionaries, unless copied from ours. Thus the terms, land-office; land-warrant; location of land; consociation of churches; regent of a university; intendant of a city; plantation, selectmen, senate, congress, court, assembly, escheat, &c.° are either words not belonging to the language of England, or they are applied to things in this country which do not exist in that. No person in this country will be satisfied with the English definitions of the words congress, senate and assembly, court, &c. for although these are words used in England, yet they are applied in this country to express ideas which they do not express in that country. With our present constitutions of government, escheat can never have its feudal sense in the United States.
|heraldry = system of coats of arms
&c. = et cetera
 But this is not all. In many cases, the nature of our governments, and of our civil institutions, requires an appropriate language in the definition of words, even when the words express the same thing, as in England. Thus the English Dictionaries inform us that a Justice is one deputed by the king to do right by way of judgment — he is a Lord by his office — Justices of the peace are appointed by the king’s commission — language which is inaccurate in respect to this officer in the United States. So constitutionally is defined by Todd° or Chalmers,° legally, but in this country the distinction between constitution and law requires a different definition. In the United States, a plantation is a very different thing from what it is in England. The word marshal, in this country, has one important application unknown in England or in Europe.
|Henry John Todd, lexicographer
Alexander Chalmers, antiquarian
 A great number of words in our language require to be defined in a phraseology accommodated to the condition and institutions of the people in these states, and the people of England must look to an American Dictionary for a correct understanding of such terms.
 The necessity therefore of a Dictionary suited to the people of the United States is obvious; and I should suppose that this fact being admitted, there could be no difference of opinion as to the time, when such a work ought to be substituted for English Dictionaries.
 There are many other considerations of a public nature, which serve to justify this attempt to furnish an American Work which shall be a guide to the youth of the United States. Most of these are too obvious to require illustration.
 One consideration however which is dictated by my own feelings, but which I trust will meet with approbation in correspondent feelings in my fellow citizens, ought not to be passed in silence. It is this. “The chief glory of a nation,” says Dr. Johnson, “arises from its authors.” With this opinion deeply impressed on my mind, I have the same ambition which actuated° that great man when he expressed a wish to give celebrity to Bacon, to Hooker, to Milton and to Boyle.
|actuated = motivated
 I do not indeed expect to add celebrity to the names of Franklin, Washington, Adams, Jay, Madison, Marshall, Ramsay, Dwight, Smith, Trumbull, Hamilton, Belknap, Ames, Mason, Kent, Hare, Silliman, Cleaveland, Walsh, Irving, and many other Americans distinguished by their writings or by their science; but it is with pride and satisfaction, that I can place them, as authorities, on the same page with those of Boyle, Hooker, Milton, Dryden, Addison, Ray, Milner, Cowper, Davy, Thomson and Jameson.
 A life devoted to reading and to an investigation of the origin and principles of our vernacular language, and especially a particular examination of the best English writers, with a view to a comparison of their style and phraseology, with those of the best American writers, and with our colloquial usage, enables me to affirm with confidence, that the genuine English idiom is as well preserved by the unmixed English of this country, as it is by the best English writers. Examples to prove this fact will be found in the Introduction to this work. It is true, that many of our writers have neglected to cultivate taste, and the embellishments of style; but even these have written the language in its genuine idiom. In this respect, Franklin and Washington, whose language is their hereditary mother tongue, unsophisticated° by modern grammar, present as pure models of genuine English, as Addison or Swift. But I may go farther, and affirm, with truth, that our country has produced some of the best models of composition. The style of President Smith; of the authors of the Federalist; of Mr. Ames; of Dr. Mason; of Mr. Harper; of Chancellor Kent; [the prose] of Mr. Barlow; of the legal decisions of the Supreme Court of the United States; of the reports of legal decisions in some of the particular states; and many other writings; in purity, in elegance and in technical precision, is equaled only by that of the best British authors, and surpassed by that of no English compositions of a similar kind.
|unsophisticated = not polluted
 The United States commenced their existence under circumstances wholly novel and unexampled in the history of nations. They commenced with civilization, with learning, with science, with constitutions of free government, and with that best gift of God to man, the christian religion. Their population is now equal to that of England; in arts and sciences, our citizens are very little behind the most enlightened people on earth; in some respects, they have no superiors; and our language, within two centuries, will be spoken by more people in this country, than any other language on earth, except the Chinese, in Asia, and even that may not be an exception.
 It has been my aim in this work, now offered to my fellow citizens, to ascertain the true principles of the language, in its orthography and structure; to purify it from some palpable errors, and reduce the number of its anomalies,° thus giving it more regularity and consistency in its forms, both of words and sentences; and in this manner, to furnish a standard of our vernacular tongue, which we shall not be ashamed to bequeath to three hundred millions of people, who are destined to occupy, and I hope, to adorn the vast territory within our jurisdiction.
|anomalies = irregularities
 If the language can be improved in regularity, so as to be more easily acquired° by our own citizens, and by foreigners, and thus be rendered a more useful instrument for the propagation of science, arts, civilization and Christianity; if it can be rescued from the mischievous influence of sciolists° and that dabbling spirit of innovation which is perpetually disturbing its settled usages and filling it with anomalies; if, in short, our vernacular language can be redeemed from corruptions, and our philology and literature from degradation; it would be a source of great satisfaction to me to be one among the instruments of promoting these valuable objects. If this object cannot be effected,° and my wishes and hopes are to be frustrated, my labor will be lost, and this work must sink into oblivion.
|acquired = learned
sciolists = superficially learned people
effected = brought about
 This Dictionary, like all others of the kind, must be left, in some degree, imperfect; for what individual is competent to trace to their source, and define in all their various applications, popular, scientific and technical, sixty or seventy thousand words! It satisfies my mind that I have done all that my health, my talents and my pecuniary° means would enable me to accomplish. I present it to my fellow citizens, not with frigid indifference, but with my ardent wishes for their improvement and their happiness; and for the continued increase of the wealth, the learning, the moral and religious elevation of character, and the glory of my country.
|pecuniary = related to money
 To that great and benevolent Being, who, during the preparation of this work, has sustained a feeble constitution,° amidst obstacles and toils, disappointments, infirmities and depression; who has twice borne me and my manuscripts in safety across the Atlantic, and given me strength and resolution to bring the work to a close, I would present the tribute of my most grateful acknowledgments. And if the talent which he entrusted to my care, has not been put to the most profitable use in his service, I hope it has not been “kept laid up in a napkin,” and that any misapplication of it may be graciously forgiven.
|constitution = health
 New Haven, 1828.