certainly
adverb
definitely or positively (`sure' is sometimes used informally for `surely')
“the results are surely encouraging”
“she certainly is a hard worker”
Source: WordNet 3.1, Princeton University
Certainly meaning
What does “certainly” mean? Definitions, examples, synonyms and opposites.
“certainly” is an adverb with one meaning. Its most common meaning is: definitely or positively (`sure' is sometimes used informally for `surely').