carrier

(noun) someone whose employment involves carrying something. Synonyms: bearer, toter. Example: "The bonds were transmitted by carrier."

(noun) a self-propelled wheeled vehicle designed specifically to carry something. Example: "Refrigerated carriers have revolutionized the grocery business."

(noun) a large warship that carries planes and has a long flat deck for takeoffs and landings. Synonyms: aircraft carrier, flattop, attack aircraft carrier.

(noun) 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.

(noun) a person or firm in the business of transporting people or goods or messages. Synonyms: common carrier.

(noun) a radio wave that can be modulated in order to transmit a signal. Synonyms: carrier wave.

(noun) a man who delivers the mail. Synonyms: mailman, postman, mail carrier, letter carrier.

(noun) a boy who delivers newspapers. Synonyms: newsboy.

(noun) (medicine) a person (or animal) who has some pathogen to which he is immune but who can pass it on to others. Synonyms: immune carrier.

(noun) a rack attached to a vehicle; for carrying luggage or skis or the like.

(noun) (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.