smoking, smoke - the act of smoking tobacco or other substances; "he went outside for a smoke"; "smoking stinks"

breathing out, exhalation, expiration - the act of expelling air from the lungs

breathing, eupneic, eupnoeic - passing or able to pass air in and out of the lungs normally; sometimes used in combination; "the boy was disappointed to find only skeletons instead of living breathing dinosaurs"; "the heavy-breathing person on the telephone"