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Cambridge English Dictionary

Choose from corpus-informed dictionaries for English language learners at all levels. They’re ideal for anyone preparing for Cambridge English exams and IELTS. The English dictionary includes the Cambridge Advanced Learner’s Dictionary, the Cambridge Academic Content Dictionary, and the Cambridge Business English Dictionary. The Cambridge Learner’s Dictionary is perfect for intermediate learners.

Collins English Dictionary

An unparalleled resource for word lovers, word gamers, and word geeks everywhere, Collins online Unabridged English Dictionary draws on Collins extensive language databases and covers many literary and rare words useful for crossword solvers and setters as well as Scrabble players.

Longman

Welcome to Longman Dictionary of Contemporary English Online

Merriam-Webster Dictionary

Oxford English Dictionary

An unsurpassed guide for researchers in any discipline to the meaning, history, and usage of over 500,000 words and phrases across the English-speaking world.

Urban Dictionary

Vocabulary.com