carrier, bearer, toter -- (someone whose employment involves carrying something; "the bonds were transmitted by carrier")
carrier -- (a self-propelled wheeled vehicle designed specifically to carry something; "refrigerated carriers have revolutionized the grocery business")
carrier -- (an inactive substance that is a vehicle for a radioactive tracer of the same substance and that assists in its recovery after some chemical reaction)
carrier, common carrier -- (a person or firm in the business of transporting people or goods or messages)
carrier wave, carrier -- (a radio wave that can be modulated in order to transmit a signal)
carrier, newsboy -- (a boy who delivers newspapers)
carrier, immune carrier -- ((medicine) a person (or animal) who has some pathogen to which he is immune but who can pass it on to others)
carrier -- (a rack attached to a vehicle; for carrying luggage or skis or the like)
carrier -- ((genetics) an organism that possesses a recessive gene whose effect is masked by a dominant allele; the associated trait is not apparent but can be passed on to offspring)