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• carrier
  carrier

  noun

  a person or thing that carries.
• Carrier
  Carrier

  noun

  a member of an Athapaskan Native North American people of British Columbia

carrier

American  

[kar-ee-er] / ˈkær i ər /

noun

1. a person or thing that carries.

2. an employee of the post office who carries mail.

3. a person who delivers newspapers, magazines, etc., on a particular route.

4. Transportation.

   1. an individual or company, as a railroad or steamship line, engaged in transporting passengers or goods for profit.

   2. common carrier.

5. Insurance. a company that acts or functions as an underwriter or insurer.

6. a frame, usually of metal, attached to a vehicle for carrying skis, luggage, etc., as on top of an automobile or station wagon; rack.

7. aircraft carrier.

8. Immunology. an individual harboring specific pathogenic organisms who, though often immune to the agent harbored, may transmit the disease to others.

9. Genetics.

   1. an individual possessing an unexpressed, recessive trait.

   2. the bearer of a defective gene.

10. Also called carrier wave.  Radio. the wave whose amplitude, frequency, or phase is to be varied or modulated to transmit a signal.

11. Machinery. a mechanism by which something is carried or moved.

12. Chemistry. a catalytic agent that brings about a transfer of an element or group of atoms from one compound to another.

13. Also called charge carrier.  Physics. any of the mobile electrons or holes in a metal or semiconductor that enable it to conduct electrical charge.

14. Physical Chemistry. a usually inactive substance that acts as a vehicle for an active substance.

15. carrier pigeon.

16. Painting. base.

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carrier ¹ British  

/ ˈkærɪə /

noun

1. a person, thing, or organization employed to carry goods, passengers, etc

2. a mechanism by which something is carried or moved, such as a device for transmitting rotation from the faceplate of a lathe to the workpiece

3. pathol another name for vector

4. pathol a person or animal that, without having any symptoms of a disease, is capable of transmitting it to others

5. Also called: charge carrier.  physics an electron, ion, or hole that carries the charge in a conductor or semiconductor

6. short for carrier wave

7. chem

   1. the inert solid on which a dyestuff is adsorbed in forming a lake

   2. a substance, such as kieselguhr or asbestos, used to support a catalyst

   3. an inactive substance containing a radioisotope used in radioactive tracing

   4. an inert gas used to transport the sample through a gas-chromatography column

   5. a catalyst that effects the transfer of an atom or group from one molecule to another

8. See aircraft carrier

9. a breed of domestic fancy pigeon having a large walnut-shaped wattle over the beak; a distinct variety of pigeon from the homing or carrier pigeon See also carrier pigeon

10. a US name for roof rack

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Carrier ² British  

/ ˈkærɪə /

noun

1. a member of an Athapaskan Native North American people of British Columbia

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carrier Scientific  

/ kăr′ē-ər /

1. A person, animal, or plant that serves as a host for a pathogen and can transmit it to others, but is immune to it. Mosquitoes are carriers of malaria.

2. An organism that carries a gene for a trait but does not show the trait itself. Carriers can produce offspring that express the trait by mating with another carrier of the same gene.

3. See more at recessive

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Other Word Forms

Derived Forms

• intercarrier
  noun
• noncarrier
  noun
• supercarrier
  noun

Etymology

Origin of carrier

Middle English word dating back to 1350–1400; see origin at carry, -er ¹

Explanation

In medicine, a person is a carrier if they test positive for a pathogen or a genetic defect without showing any symptoms. This person can unwittingly spread the illness to others without ever knowing he or she is the source. If your job involves carrying things or people, you work as a carrier. If you deliver newspapers, you are a newspaper carrier. If the job is to transport household items or people, your business is as a common carrier, such as a moving company or an airline. But if you deliver aircraft, you are not an aircraft carrier — that would be a large, flat-decked, military ship where planes can land or take off at sea.

Example Sentences

FedEx Freight, the largest LTL carrier, spun off on June 1, now trades at 30 times expected earnings, below peers at 40 times.

From Barron's • Jun. 2, 2026

The IRS does not care much whether you send the money to your son via Zelle, Venmo, wire transfer between your banks or carrier pigeon, as long as you account for it accurately and honestly.

From MarketWatch • Jun. 2, 2026

The couple have a son whom Gomez wore in a baby carrier during the lengthy House speaker election in 2023.

From Los Angeles Times • Jun. 2, 2026

It entered talks in January with bankrupt US carrier Spirit Airlines over a possible takeover.

From BBC • Jun. 1, 2026

“What did you do without me when you were sailing around on that aircraft carrier last year?”

From "The Great Santini" by Pat Conroy

Related Words

• aircraft carrier
• warship