In general, a carrier is a system or process with a specific property or is attributed of something (in physical or in abstract sense). "Carrier" has several very different meanings:
- an individual or organization engaged in transporting passengers or goods for hire.
- in semiconductor physics, a charge carrier, either a free electron or an electron hole.
- in telecommunication, a carrier wave
- in biology, an asymptomatic carrier or a carrier-protein
- the Dakelh, an indigenous First Nations people in British Columbia, Canada, who were formerly referred to as the Carrier
- the Carrier language, the Athabaskan language of the Dakelh people
- a common carrier, a transport business (shipping or telecom)
- an aircraft carrier
- Willis Carrier, the inventor of air-conditioning
- Carrier, a video game for the Sega Dreamcast
- Carrier a South Pacific World War II game from Avalon Hill
- the town of Carrier, Oklahoma
- a unit in the computer game StarCraft, the Protoss Carrier.
- the enormous living interdimensional spaceship home to the Authority
- a Lathe carrier is a device that transfers motion to a workpiece.
- in mathematics, the set over which a Boolean algebra is defined is the carrier.