Meaning of “pretty” - Learner’s Dictionary

pretty

adverb us uk /ˈprɪti/ informal
She runs every day so she's in pretty good shape.My software is pretty basic.The food was pretty average.He said he didn't go because it was raining, which is a pretty lame excuse if you ask me.I'm feeling pretty tired.

B1 quite, but not extremely:

The traffic was pretty bad.
I'm pretty sure they'll accept.
pretty much/well

B2 almost:

We've pretty much finished here.

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