The largest and most trusted free online dictionary for learners of British and American English with definitions, pictures, example sentences, synonyms, antonyms, word origins, audio pronunciation, and more.

The historical 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. Find out more about OED

Oxford Advanced Learner's Dictionary. The world's bestselling advanced-level dictionary for learners of English. Since 1948, over 100 million English language learners have used OALD to develop their English skills for work and study.

The Oxford Advanced American Dictionary is an advanced-level monolingual dictionary for learners of American English. It includes 145,000 words, phrases, and meanings and 85,500 examples showing how words are used.

The Oxford English Dictionary (OED) is the principal historical dictionary of the English language, published by Oxford University Press (OUP), a University of Oxford publishing house.

"Oxford Dictionary of English" published on by Oxford University Press. The foremost single volume authority on the English language, the Oxford Dictionary of English is at the forefront of language research, focusing on English as it is used today.

Dive into our interactive resources to learn more about the Oxford English Dictionary and uncover the rich history and usage of 500,000 words and phrases past and present, from across the English-speaking world.