certainly Meaning, Definition & Usage

1. adverb definitely or positively (`sure' is sometimes used informally for `surely')
   sure; sure enough; sure as shooting; surely; for certain; for sure.
   
   • the results are surely encouraging
   • she certainly is a hard worker
   • it's going to be a good day for sure
   • they are coming, for certain
   • they thought he had been killed sure enough
   • he'll win sure as shooting
   • they sure smell good
   • sure he'll come

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