Meaning of “carrier” in the English Dictionary

"carrier" in British English

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carriernoun [ C ]

uk /ˈkær.i.ər/ us /ˈker.i.ɚ/

carrier noun [ C ] (SPREAD)

someone who does not suffer from a disease but has the infection or genetic fault that causes it and can give the disease to someone else:

There are an estimated 1.5 million HIV carriers in the country.

(Definition of “carrier” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"carrier" in American English

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carriernoun [ C ]

us /ˈkær·i·ər/

carrier noun [ C ] (TRANSPORT)

a person or thing that carries or delivers something:

She’s got a job as a letter carrier.

carrier noun [ C ] (SPREAD)

medical a person who can give a disease to other people but may not show any signs of having the disease

(Definition of “carrier” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"carrier" in Business English

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carriernoun [ C ]

uk /ˈkæriər/ us

TRANSPORT a company that transports goods or people from one place to another:

The company loses fewer drivers because it is a shorter-haul carrier whose drivers are typically away overnight rather than weeks on end.
Sioux Railway is the ninth largest rail carrier in the nation.

TRANSPORT a company that operates aircraft:

The Dallas-based carrier will offer same-plane service with one or more stops to 27 cities.
Etihad Airways is Abu Dhabi's national carrier.
low-cost/low-fare/no-frills carrier

INSURANCE a company or organization that provides insurance:

The company will pay $2 million of the settlement, with the rest from its insurance carrier and other parties.

COMMUNICATIONS a company that provides a communications service such as a phone, television, or internet service:

Number portability allows you to transfer your existing cell phone number to a new carrier.
a mobile/mobile phone/cellphone carrier
In 1984 AT&T became the largest long-distance carrier.

(Definition of “carrier” from the Cambridge Business English Dictionary © Cambridge University Press)