Dictionary

certainly

adverb cer·tain·ly \-lē\

: without doubt

: of course

Full Definition of CERTAINLY

1
:  in a manner that is certain :  with certainty
2
:  it is certain that :  assuredly

Examples of CERTAINLY

  1. It will certainly rain tomorrow.
  2. This year's festival was certainly much better than last year's.
  3. I'm certainly going to try.
  4. The new version is most certainly easier to use.
  5. The snake that bit her was almost certainly poisonous.

First Known Use of CERTAINLY

14th century

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