Definition of smoke-gray:
(n) :
(uncountable) The visible vapor/vapour, gases, and fine particles given off by burning or smoldering material.
(n) :
(colloquial, countable) A cigarette.
(n) :
(colloquial, uncountable) Anything to smoke (e.g. cigarettes, marijuana, etc.)
(n) :
(colloquial, countable, never plural) An instance of smoking a cigarette, cigar, etc.; the duration of this act.
(n) :
(uncountable, figuratively) A fleeting illusion; something insubstantial, evanescent, unreal, transitory, or without result.
(n) :
(uncountable, figuratively) Something used to obscure or conceal; an obscuring condition; see also smoke and mirrors.