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

dog (dôg, dŏg)
Share:
n.
1. A domesticated carnivorous mammal (Canis familiaris syn. Canis lupus subsp. familiaris) occurring as a wide variety of breeds, many of which are traditionally used for hunting, herding, drawing sleds, and other tasks, and are kept as pets.
2. Any of various carnivorous mammals of the family Canidae, such as the dingo.
3. A male animal of the family Canidae, especially of a fox or a domesticated breed.
4. Any of various other animals, such as the prairie dog.
5. Informal
a. A person: You won, you lucky dog.
b. A person regarded as contemptible: You stole my watch, you dog.
6. Slang
a. A person regarded as unattractive or uninteresting.
b. Something of inferior or low quality: "The President had read the speech to some of his friends and they told him it was a dog" (John P. Roche).
c. An investment that produces a low return or a loss.
7. dogs Slang The feet.
8. See andiron.
9. Slang A hot dog; a wiener.
10. Any of various hooked or U-shaped metallic devices used for gripping or holding heavy objects.
11. Astronomy A sundog.
adv.
Totally; completely. Often used in combination: dog-tired.
tr.v. dogged, dog·ging, dogs
1. To track or trail persistently: "A stranger then is still dogging us" (Arthur Conan Doyle).
2. To hold or fasten with a mechanical device: "Watertight doors and hatches were dropped into place and dogged down to give the ship full watertight integrity" (Tom Clancy).
3.
a. To be persistently or inescapably associated with: Questions about his youthful indiscretions dogged him throughout his career.
b. To be recurrently or persistently in the mind; haunt: Despair dogged him in his final years.
Idioms:
dog it Slang
To fail to expend the effort needed to do or accomplish something.
go to the dogs
To go to ruin; degenerate.
put on the dog Informal
To make an ostentatious display of elegance, wealth, or culture.

[Middle English dogge, cur, ordinary dog (often as opposed to a hunting hound or other valuable dog), from Old English docga, dog, perhaps originally a diminutive or a hypocorism meaning "Darky, Dusky," from dox, dark, dusky (for the formation, compare Old English frox, frog, and frogga, frog, perhaps originally a diminutive).]

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.