1. unpleasantly harsh or grating in sound

    Synonyms : gravelly, rasping, raspy, rough, scratchy
  2. 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

    Synonyms : diffraction grating
    Type Of : optical device
  3. a barrier that has parallel or crossed bars blocking a passage but admitting air

    Synonyms : grate
    Type Of : barrier
  4. a frame of iron bars to hold a fire

    Synonyms : grate
    Type Of : frame, framework