I. grat ‧ ing 1 /ˈɡreɪtɪŋ/ BrE AmE noun [countable]
a metal frame with bars across it, used to cover a window or hole:
Leaves clogged the grating over the drain.
II. grating 2 BrE AmE adjective
a grating sound is hard and unpleasant:
a harsh grating voice