noun
plural grates
[count] :a metal frame with bars across it that is used in a fireplace or to cover an opening
verb
grates; grated; grating
[+ obj] :to cut (food) into very small pieces by rubbing it against a special tool (called a grater)
[no obj] :to make a harsh, unpleasant noise by rubbing against something
[no obj] :to have an annoying effect