gambler /ˈɡæmblɚ/noun 2forms 1phrases 1 noun2 •One who plays at a game of chance, who gambles. •One who takes significant risks. formsgamblers Phrases with gambler amber gamblerA driver of a road vehicle who accelerates when the traffic lights change from green to amber (instead of stopping, as required by law), gambling that no vehicle will cross his or her path; a driver who starts off when the traffic lights show red and amber together, but not yet green.