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Dictionaries and Thesauruses

Wordnik definitions and synonyms/antonyms come from multiple sources, including:

The American Heritage® Dictionary of the English Language, Fourth Edition

Copyright © 2008, 2000 by Houghton Mifflin Harcourt Publishing Company. Updated in 2008. Published by Houghton Mifflin Harcourt Publishing Company. No part of this database may be reproduced or otherwise used without prior written permission from the publisher unless such use is expressly permitted by applicable law.

Words are included in this Dictionary on the basis of their usage. Words that are known to have current trademark registrations are shown with an initial capital and are also identified as trademarks. No investigation has been made of common-law trademark rights in any word, because such investigation is impracticable. The inclusion of any word in this Dictionary is not, however, an expression of the Publisher's opinion as to whether or not it is subject to proprietary rights. Indeed, no definition in this Dictionary is to be regarded as affecting the validity of any trademark.

American Heritage® and the eagle logo are registered trademarks of American Heritage Inc. Their use is pursuant to a license agreement with American Heritage Inc.

The Century Dictionary and Cyclopedia

For more information about the Century, Wikipedia is your friend.

GCIDE

GCIDE is the GNU version of the Collaborative International Dictionary of English. Entries from GCIDE are available under a CC-BY-SA 3.0 license.

Roget's II: The New Thesaurus, Third Edition

Copyright © 2003, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Wordnet 3.0

Copyright © 2006 by Princeton University. All rights reserved.

Wiktionary

Entries from Wiktionary are available under a CC-BY-SA 3.0 license.

Wordnik would like to especially thank the tireless contributors to the English Wiktionary.

Audio

Wordnik audio comes from Wordnik users, as well as from these sources:

The American Heritage® Dictionary of the English Language, Fourth Edition

Copyright © 2008, 2000 by Houghton Mifflin Harcourt Publishing Company. Updated in 2008. Published by Houghton Mifflin Harcourt Publishing Company. No part of this database may be reproduced or otherwise used without prior written permission from the publisher unless such use is expressly permitted by applicable law.

Words are included in this Dictionary on the basis of their usage. Words that are known to have current trademark registrations are shown with an initial capital and are also identified as trademarks. No investigation has been made of common-law trademark rights in any word, because such investigation is impracticable. The inclusion of any word in this Dictionary is not, however, an expression of the Publisher's opinion as to whether or not it is subject to proprietary rights. Indeed, no definition in this Dictionary is to be regarded as affecting the validity of any trademark.

American Heritage® and the eagle logo are registered trademarks of American Heritage Inc. Their use is pursuant to a license agreement with American Heritage Inc.

Macmillan Dictionary—Online English Dictionary and Thesaurus

Additional audio is provided from the Macmillan Dictionary.

Images

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Tweets

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