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A person or object that carries someone or something else.
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A carrier pigeon.
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A person or company in the business of shipping freight.
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A signal such as radio, sound, or light that is modulated to transmit information.
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(telecommunications) A mobile network operator; wireless carrier.
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(aviation) A certified airline.
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(engineering) That which drives or carries.
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(chemistry) A catalyst or other intermediary in a chemical reaction.
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(genetics, pathology) A person or other organism that has a genetic trait, mutation or infection liable to cause a disease, but displays no symptoms.
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(physics, electronics) A charge carrier.
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(art, manufacturing) A liquid or gas used as a medium for another substance.