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Dictionary definition for: Grating

1. (n) a barrier that has parallel or crossed bars blocking a passage but admitting air

2. (s) unpleasantly harsh or grating in sound; "a gravelly voice"

3. (n) a frame of iron bars to hold a fire

4. (n) 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

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