passive smoking(inhalation of smoke from somebody else's tobacco) noun [UK: ˈpæ.sɪv ˈsməʊkɪŋ] [US: ˈpæ.sɪv ˈsmoʊkɪŋ]
second-hand smoke(smoke from cigarettes, that any person including non-smokers could breathe in) noun [UK: ˈsek.ənd hænd sməʊk] [US: ˈsek.ənd ˈhænd smoʊk]