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Dictionaries and Thesauruses

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

Wordnet

WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.

American Heritage and Roget's II

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.

Roget's II: The New Thesaurus, Third Edition by the Editors of the American Heritage(r) Dictionary. Copyright © 2003, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Century Dictionary

For more information about The Century Dictionary and Cyclopedia,Wikipedia is your friend.

Wiktionary

Definitions from English Wiktionary are available thanks to the lovely people who contribute to it and under a CC-BY-SA license.

Audio

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American Heritage

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

Additional audio is provided from the Macmillan Dictionary -- Online English Dictionary and Thesaurus.

Images

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