Third-person singular simple present indicative form of grate

(typically of a voice) Harsh and unpleasant. / Abrasive; tending to annoy.

present participle of grate

A barrier that has parallel or crossed bars blocking a passage but admitting air. / A frame of iron bars to hold a fire. / The loose material that comes from something being grated.

simple past tense and past participle of grate

Produced by grating. / Furnished with a grate or grating.

(physics) a surface having many closely spaced lines or slits; used to produce optical spectra by mutual interference

plural of register grate

A grate with a shutter behind it.

(physics) A form of diffraction grating optimized for high orders of diffraction