GRATING

Definition of GRATING

  1. (adj)unpleasantly harsh or grating in sound
  2. (noun)a barrier that has parallel or crossed bars blocking a passage but admitting air
  3. (noun)a frame of iron bars to hold a fire
  4. (noun)optical device consisting of a surface with many parallel grooves in it; disperses a beam of light (or other electromagnetic radiation) into its wavelengths to produce its spectrum