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.
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.
AMERICAN HERITAGE DICTIONARY APP
The new American Heritage Dictionary app is now available for iOS and Android.
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.
INTERESTED IN DICTIONARIES?
Check out the Dictionary Society of North America at http://www.dictionarysociety.com
do·main  (dō-mān)
Share:
Tweet n. 1. A territory over which rule or control is exercised. 2. A sphere of activity, influence, or knowledge: the domain of history. See Synonyms at field. 3. Mathematics a. The set of all possible values of an independent variable of a function. b. An open connected set that contains at least one point. 4. Computers A group of networked computers that share a common communications address. 5. Physics Any of numerous contiguous regions in a ferromagnetic material in which the direction of spontaneous magnetization is uniform and different from that in neighboring regions. 6. Biology Any of three primary divisions of organisms, consisting of the eukaryotes, bacteria, and archaea, that rank above a kingdom in taxonomic systems based on similarities of DNA sequences. 7. Law The land of one with paramount title and absolute ownership. [French domaine, blend of Old French demaine (from Late Latin dominicum) and Latin dominium, property, both from dominus, lord; see dem- in the Appendix of Indo-European roots.] |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
