1 [transitive, intransitive] smoke (something) to suck smoke from a cigarette, pipe, etc. into your mouth and let it out again He was smoking a large cigar. How many cigarettes do you smoke a day? Do you mind if I smoke?2 [intransitive] to use cigarettes, etc. in this way as a habit Do you smoke? She smokes heavily. I’ve never smoked. You’re too young to smoke. He smokes like a chimney (= a lot).