Meaning of “visor” - Learner’s Dictionary

visor

noun [ C ] us uk /ˈvaɪzər/
PART OF HAT

the part of a helmet (= hard hat that protects your head) that you can pull down to cover your face

HAT also sun visor

a hat that has a curved part above your eyes to protect them from the sun

CAR

the parts in the front window of a car that you pull down to protect your eyes from the sun

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