1.grey的基本意思是“灰色”,指介于黑、白两色之间的一种颜色。grey还可指“灰颜色的衣服”,此时多为不可数名词。
2.grey也可写成gray,英式英语中多用前者,而美式英语中则偏重于后者。
3.in grey表示“穿着灰色的衣服”。

This colour is grey.这种颜色是灰色。
Some people like grey.有些人喜欢灰色。
I never wear grey.我从不穿灰色服装。
I'd like a pair in charcoal grey.我要一条深灰色的裤子。
She was dressed in grey.她穿着灰色服装。
The man in grey is Tom's father.那个穿灰衣服的人是汤姆的父亲。
Nowadays few people like to be dressed in grey.如今,很少有人喜欢穿灰色的衣服了。

1.grey用作形容词时的意思是“灰色的,灰白的”,指某一物体呈现出灰色或灰白色。还可指“灰暗的,阴沉的”,多用来修饰天气。grey还可用来指一个人的心情烦闷或生活空虚,即“郁闷的,单调乏味的”。grey还可指“无生气的,不突出的,无名的”。在黑人英语里, grey常用来指“白人,白人的”。
2.grey在句中可用作定语或表语。

用作定语
▲～+n.
He changed into the anonymous costume of grey cotton shirt.他换上了一般人穿的灰色棉衬衫。
He wore a grey suit.他穿一套灰衣服。
He has grey hairs.他头发花白。
The identity of these grey men of politics should be revealed.应揭露这些不露身份的政界人士的身份。
What about that grey girl in New York?纽约的那位白人姑娘你中意吗?
用作表语
▲S+be+～
Henry's hair goes grey.亨利的头发变灰白了。
Otto was still looking grey and very tired.奥托仍是面色苍白,显得疲惫不堪。
The day started out grey, with a shower or two.天破晓时阴沉沉的,下了一两场阵雨。
His face turned grey as he heard the bad news.当听到这个坏消息时,他的脸色变得灰白。
To her, life seems grey and joyless.对她来讲,人生似乎很乏味。
▲S+be+～+prep.-phrase
Her hair is going grey with worry.由于忧虑,她的头发在变灰白。
She's gone quite grey in the last few years.这几年来,她的头发白得很厉害。

在美式英语中有些短语里只能用gray,而不能用grey。例如:
gray list灰名单; graymail扬言要公开政府机密的讹诈。

［词源］  ＜古英语græg(灰色)