involuntarily breathing in the tobacco smoke of a smoker in the vicinity and thereby endangering one's health
Passive smoking involves breathing in the smoke from other people's cigarettes because you happen to be near them. the dangers of passive smoking. The involuntary inhalation of tobacco smoke by a person, especially a nonsmoker, who occupies an area with smokers or a smoker. Also called passive inhalation. the act of breathing in smoke that is in the air around you when someone else is smoking cigarettes