[ def-uh-nit-lee ]
See synonyms for definitely on
  1. in a clear and definite manner; unambiguously.

  2. unequivocally; positively.

  1. (used to express complete agreement or strong affirmation): Are you starting your diet tomorrow? Definitely!

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Origin of definitely

First recorded in 1575–85; definite + -ly

synonym study For definitely

1. See clearly.

Other words for definitely

Words Nearby definitely Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use definitely in a sentence

British Dictionary definitions for definitely


/ (ˈdɛfɪnɪtlɪ) /

  1. in a definite manner

  2. (sentence modifier) certainly: he said he was coming, definitely

sentence substitute
  1. unquestionably: used to confirm an assumption by a questioner

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012