Meaning of GRATING in English
1. adj.1 sounding harsh or discordant (a grating laugh).
2 having an irritating effect.
gratingly adv.2. n.1 a framework of parallel or crossed metal bars.
2 Optics a set of parallel wires, lines ruled on glass, etc., for producing spectra by diffraction.
Oxford English vocab. Оксфордский английский словарь. 2012