Definition of "carrier" []

• One that transports or conveys: baggage carriers; a message carrier. (noun)
• One, such as a person, business, or organization, that deals in the transport of passengers or goods. (noun)
• A mechanism or device by which something is conveyed or conducted. (noun)
• Medicine A person or an animal that shows no symptoms of a disease but harbors the infectious agent of that disease and is capable of transmitting it to others. (noun)
• Genetics An individual that carries one gene for a particular recessive trait. A carrier does not express the trait but, when mated with another carrier, can produce offspring that do. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "-- The immense superiority of the Transcontinental over any other road, as a grain carrier, is due to the fact that a train can travel from the Yellowhead Pass to tide water at Quebec without encountering any adverse grades greater than four-tenths of one per cent., or 21 feet to the mile."
• "Seth Bloom, a spokesman at AT&T, told GigaOm that the carrier is adding capacity to the downtown Austin network, and attendees should see their [...]"
• "Seth Bloom, a spokesman at AT&T, emailed me 10 minutes ago to say that the carrier is adding capacity to the downtown Austin network, and attendees should see their iPhone (or other AT&T device) experience improve by this evening."