Adverb: certainly sur-t(u)n-lee
- Definitely or positively
"she certainly is a hard worker";
- surely, sure, for sure, for certain, sure enough, sure as shooting [informal]
- Indicates an affirmative response
- ay [dialect], aye [dialect], sure [informal], uh-huh [informal], yah [UK, informal], yea [informal], yeah [informal], yeh [informal], yep [informal], yes, yup [informal], ya [S.Africa, informal]
See also: beyond a doubt, beyond a shadow of a doubt, beyond doubt, indisputably, indubitably, without a doubt
Encyclopedia: Certainly