Cambridge Free English Dictionary and Thesaurus Free online dictionary from Cambridge University Press.
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Dictionary and Thesaurus - Merriam-Webster Online Free searchable dictionary and thesaurus, word games, a word of the day, and many other English language and vocabulary reference tools and resources.
Longman English Dictionary Online Searchable dictionary of contemporary English.
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look - definition of look by The Free Dictionary look (l k) v. looked, look·ing, looks v.intr. 1. a. To employ one's sight, especially in a given direction or on a given object: looking out the window; looked at the floor. b. To search: We looked all afternoon but could not find it. 2. a. To turn one's
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Look up | Define Look up at Dictionary.com an act or instance of looking something up, as information in a reference book or an online database. Expand.