Certainly, absolutely, as a matter of course, absolutely, and by all means are all synonyms for definitely. Possibly and doubtfully are these antonyms of definitely. And here are another 55 synonyms for definitely.
Definitely Synonyms
- Absolutely
- Assuredly
- Beyond any doubt
- By a mile
- Categorically
- Certainly
- Clearly
- Decidedly
- Easily
- Far and away
- For sure
- Incontestably
- Incontrovertibly
- Indubitably
- Irrefutably
- Needless to say
- Obviously
- Palpably
- Patently
- Plainly
- Positively
- Surely
- There are no two ways about it
- There's no denying it
- Transparently
- Undeniably
- Undoubtedly
- Unequivocally
- Unmistakably
- Unquestionably
- Without fail
- Without/beyond doubt
- Without/beyond question
- As sure as eggs is eggs
2. naturally
- As a matter of course
- As might be expected
- As was anticipated
- As you/one would expect
- Certainly
- Clearly
- It goes without saying
- Naturally
- Needless to say
- Not unexpectedly
- Obviously
- To be sure
- Natch
3. yes
- Absolutely
- By all means
- Certainly
- Definitely
- With pleasure
- Yes
- Sure thing