n.

1. （门窗等的）格栅；格子板[C]
   The rainwater ran along the gutter into a grating at the side of the road.

   雨水沿着排水沟流入了路边的阴沟格栅。

a.

1. 咯吱作响的；刺耳的
   I don't like that woman with a grating voice.

   我不喜欢那个说话声音刺耳的女人。

2. 令人烦躁的

adj.

1. sounding harsh and unpleasant.
2. causing irritation.

n.

1. a framework of parallel or crossed bars, typically preventing access through an opening.
2. (also diffraction grating) Optics  a set of equally spaced parallel wires or ruled lines, used to produce spectra by diffraction.