Meaning of “preen” - Learner’s Dictionary

preen

verb [ I, T ] uk us /priːn/
BIRD

If a bird preens or preens itself, it makes its feathers clean and tidy.

PERSON

to try to look attractive:

When you've finished preening, perhaps we can go out.
[ often reflexive ] The actors preened themselves in the dressing room.

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