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



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



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



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


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

Find out more!



Check out the Dictionary Society of North America at

jeal·ous (jĕləs)
1. Fearful or wary of losing one's position or situation to someone else, especially in a sexual relationship: Her new boyfriend was jealous of her male friends.
2. Envious or resentful of the good fortune or achievements of another: I felt jealous when my coworker got a promotion. See Usage Note below.
3. Having to do with or arising from feelings of apprehension, bitterness, or envy: jealous thoughts.
4. Vigilant in guarding something: We are jealous of our good name.
5. Intolerant of disloyalty or infidelity; autocratic: a jealous god.

[Middle English jelous, from Old French gelos, gelous, from Vulgar Latin *zēlōsus, zealous, solicitous, from Late Latin zēlus, zeal; see ZEAL.]

jealous·ly adv.
jealous·ness n.

Usage Note: Traditional usage holds that we are jealous when we fear losing something that is important to us and envious when we desire that which someone else has. In this view, one might experience jealousy upon seeing one's spouse flirt with another (because of the fear of losing the spouse), while one might experience envy upon seeing a friend with an attractive date (because of one's desire to have an attractive date of one's own). In common usage, this distinction is not always observed, and jealousy and jealous are often used in situations that involve envy. Our 2015 survey shows that the distinction is alive and well: large majorities of the Usage Panel approved the traditional uses of jealousy (She was jealous when she saw her husband having dinner with another woman) and envy (He was envious of the expensive sports car his neighbor bought), while only a minority accepted the switched uses: 29 percent accepted envious for the suspicious dinner, and 34 percent accepted jealous for the expensive sports car. The last figure does mean, though, that a third of the Panelists accept jealous meaning "envious," and an even larger minority (43 percent) accept it when the entity being coveted is a person rather than an object, as in Never having been popular myself, I'm jealous of your many friends. It is evident from these results that many careful writers prefer to see the distinction between the two words maintained, with jealous being reserved for situations where one fears losing something and envious used for situations where one wants what one does not have.

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.