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Definition of word from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games.

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Comprehensive encyclopedia of mathematics with 13,000 detailed entries. Continually updated, extensively illustrated, and with interactive examples.

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Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with fr...

U.S. Customs and Border Protection secures the homeland by preventing the illegal entry of people and goods while facilitating legitimate travel and t...

The largest and most trusted free online thesaurus. Quickly find accurate and up-to-date synonyms, antonyms, and related words at Thesaurus.com. Synon...

Department of Economic and Social Affairs - Social Policy and Development Division