Definition of grating

• p. pr. &. vb. n. - of Grate
• n. - A partition, covering, or frame of parallel or cross bars; a latticework resembling a window grate; as, the grating of a prison or convent.
• n. - A system of close equidistant and parallel lines lines or bars, especially lines ruled on a polished surface, used for producing spectra by diffraction; -- called also diffraction grating.
• n. - The strong wooden lattice used to cover a hatch, admitting light and air; also, a movable Lattice used for the flooring of boats.
• a. - That grates; making a harsh sound; harsh.
• n. - A harsh sound caused by attrition.