Meaning of GRATING in English

GRATING

n.

Function: noun

Date: 1622

1 : a wooden or metal lattice used to close or floor an opening

2 : a partition, covering, or frame of parallel bars or crossbars

3 : a system of close equidistant and parallel lines or bars ruled on a polished surface to produce spectra by diffraction

Merriam Webster Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.