Meaning of “reel” - Learner’s Dictionary

reel

verb [ I ] uk us /riːl/
FEEL SHOCK

to feel very shocked:

She was still reeling from the news of his death.
WALK

to walk in a way that looks as if you are going to fall over:

He came reeling down the street like a drunk.

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