A2adverb1K

Definitely

UK /["/ˈdefɪnətli/"]/US /["/ˈdefɪnətli/"]/

Definition

a way of emphasizing that something is true and that there is no doubt about it

In simple words: For sure, without a doubt

Examples

I definitely remember sending the letter.
‘Was it what you expected?’ ‘Yes, definitely.’
‘Would you like to go back there?’ ‘**Definitely not!**'
She most definitely did not want my help.
The claim is definitely true.
If you want to know more I'd definitely recommend checking out this guide .
The date of the move has not been definitely decided yet *(= it may change)*.
Please say definitely whether you will be coming or not.

Usage notes

Use 'definitely' to emphasize certainty. It fits well in both spoken and written English. Avoid using it in overly formal contexts where alternatives like 'certainly' might be more suitable.

Grammar pattern

standalone adverb

Memory hint

Think of 'definitely' as 'definitely not uncertain' — you are sure!

Collocations

definitely agree
definitely believe
definitely know

Synonyms

certainly
surely
undoubtedly
absolutely
positively

Antonyms

doubtfully
uncertainly

Common mistakes

Often confused with 'defiantly' which means resisting authority.
Sometimes spelled incorrectly as 'definately'.