[ex.po.sure] n (1606) 1: the fact or condition of being exposed: as a: the condition of being presented to view or made known "a politician seeks a lot of ~" b: the condition of being unprotected esp. from severe weather "died of ~" c: the condition of being subject to some effect or influence "risk ~ to the flu" d: the condition of being at risk of financial loss; also: an amount at risk
2: the act or an instance of exposing: as a: disclosure of something secret "tried to prevent ~ of their past" b: the treating of sensitized material (as film) to controlled amounts of radiant energy; also: the amount of such energy or length of such treatment "a 3-second ~" 3 a: the manner of being exposed b: the position (as of a house) with respect to weather influences or compass points "a room with a southern ~"
4: a piece or section of sensitized material (as film) on which an exposure is or can be made "36 ~s per roll"