Meaning of “grate” - Learner’s Dictionary

grate

verb uk us /ɡreɪt/
FOOD [ T ]

to break food such as cheese into small, thin pieces by rubbing it against a grater (= kitchen tool with holes):

grated cheese/carrot
NOISE [ I ]

to make an unpleasant noise when rubbing against something:

The chair grated against the floor.

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