American English

Definition of extremely adverb from the Oxford Advanced American Dictionary



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 (usually with adjectives and adverbs) to a very high degree extremely important/useful/complicated She found it extremely difficult to get a job. Their new CD is selling extremely well. I would be extremely grateful if you could have a word with her. The risks involved are extremely high. Mark knew he had behaved extremely badly.
See the Oxford Advanced Learner's Dictionary entry: extremely