use-icon

HOW TO USE THE DICTIONARY

To look up an entry in The American Heritage Dictionary of the English Language, use the search window above. For best results, after typing in the word, click on the “Search” button instead of using the “enter” key.

Some compound words (like bus rapid transit, dog whistle, or identity theft) don’t appear on the drop-down list when you type them in the search bar. For best results with compound words, place a quotation mark before the compound word in the search window.

guide to the dictionary

use-icon

THE USAGE PANEL

The Usage Panel is a group of nearly 200 prominent scholars, creative writers, journalists, diplomats, and others in occupations requiring mastery of language. Annual surveys have gauged the acceptability of particular usages and grammatical constructions.

The Panelists

open-icon

AMERICAN HERITAGE DICTIONARY APP

The new American Heritage Dictionary app is now available for iOS and Android.

scroll-icon

THE AMERICAN HERITAGE DICTIONARY BLOG

The articles in our blog examine new words, revised definitions, interesting images from the fifth edition, discussions of usage, and more.

100-words-icon

See word lists from the best-selling 100 Words Series!

Find out more!

open-icon

INTERESTED IN DICTIONARIES?

Check out the Dictionary Society of North America at http://www.dictionarysociety.com

Sul·li·van (sŭlə-vən), Anne Mansfield 1866-1936.
Share:
American educator. Visually impaired herself, she was the teacher and lifelong companion of Helen Keller.

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
 
Sullivan, Louis Henry or Henri 1856-1924.
Share:
American architect known for his early steel-frame designs for skyscrapers and for his influential dictum "Form follows function."

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
 
Sullivan, Harry Stack 1892-1949.
Share:
American psychiatrist who theorized that personality is largely determined by one's interpersonal relations and the assimilation of societal values.

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
 
Sullivan, Sir Arthur Seymour 1842-1900.
Share:
British composer known for a series of comic operas, including H.M.S. Pinafore (1878) and The Mikado (1885), written with the lyricist W.S. Gilbert.
(click for a larger image)
Sir Arthur Sullivan

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
 
Sullivan, John Lawrence 1858-1918.
Share:
American prizefighter who was the heavyweight champion from 1882 to 1892. In 1889 he fought the last bare-knuckles title bout.

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
 
Sullivan, Edward Vincent Known as "Ed." 1901-1974.
Share:
American columnist and host of The Ed Sullivan Show (1948-1971), a television variety show.

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
 

Indo-European & Semitic Roots Appendices

    Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

    Indo-European Roots

    Semitic Roots

    The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.