Pronunciation: (grā'ting),[key] —n. 1. a fixed frame of bars or the like covering an opening to exclude persons, animals, coarse material, or objects while admitting light, air, or fine material.
2. Physics.See diffraction grating.
Pronunciation: (grā'ting),[key] —adj. 1. irritating or unpleasant to one's feelings.
2. (of a sound or noise) harsh, discordant, or rasping.