adjective

of a colour intermediate between black and white, as of ashes or lead.

grey flannel trousers

greyish,silvery,silver-grey,pearl-grey,pearly,gunmetal grey,slate-grey,smoke-grey,smoky,sooty,white,silver,hoary,ashen,wan,pale,pasty,pallid,colourless,sallow,leaden,bloodless,anaemic,waxen,chalky,sickly,peaked,drained,sapped,washed-out,drawn,deathly,deathlike,ghostly,peaky

noun

grey colour or pigment.

dirty intermediate tones of grey

verb

(especially of hair) become grey with age.

he had put on weight and greyed somewhat