certainly

[ sur-tn-lee ]
/ ˈsɜr tn li /

adverb

with certainty; without doubt; assuredly: I'll certainly be there.
yes, of course: Certainly, take the keys.
surely; to be sure: He certainly is successful.

Origin of certainly

Middle English word dating back to 1250–1300; see origin at certain, -ly

Example sentences from the Web for certainly

British Dictionary definitions for certainly

certainly
/ (ˈsɜːtənlɪ) /

adverb

with certainty; without doubt he certainly rides very well

sentence substitute

by all means; definitely: used in answer to questions