a.

1. 灰色的；偏灰的
   His hair is gray.

   他头发灰白。

2. 灰白头发的[F]
   He was already gray at 30.

   他三十岁时头发就已经灰白了。

3. （指脸因恐惧、生病等）苍白的
   He was still looking gray and very tired.

   他看上去仍然面色苍白，疲惫不堪。

4. 阴暗的；阴郁的
   It was a gray day.

   那是个阴天。

n.

1. 灰色[C][U]
2. 灰色颜料；灰色衣服[U]
   They were dressed in gray.

   他们穿着灰色衣服。

3. 暗淡的光线[U]

vt.

1. 使成灰色（或灰白）[（+with）]
   Sorrow has grayed his head.

   忧伤使他头发变得灰白。

vi.

1. 成为灰色（或灰白）
   He's graying at the temples.

   他两鬓的头发正在变得花白。

n.

adj.