Meaning of “perfectly” - Learner’s Dictionary

perfectly

adverb uk us /ˈpɜːfɪktli/
TO EMPHASIZE

B2 used to emphasize the word that follows it:

To be perfectly honest, I don't care any more.
I made it perfectly clear to him what I meant.
VERY WELL

B1 in a perfect way:

The jacket fits perfectly, the skirt not so well.

(Definition of “perfectly” from the Cambridge Learner’s Dictionary © Cambridge University Press)