1.of the colour of ash or lead
2.relating to, involving, or affecting people of advanced years
3.between black and white in colour. If something is similar to this colour, you can say that it is a greyish colour
4.if someone goes or turns grey, their hair starts to become white
5.if someone’s face is grey, they look pale, because they are ill, weak, or shocked
6.used for describing the weather or the light when it is not very bright, because there is a lot of cloud
8.not clear and therefore not easy to deal with
9.used for describing issues that affect old people