Definition of carrier noun from the Oxford Advanced Learner's Dictionary

  1. 1a company that carries goods or passengers from one place to another, especially by air Delta Air Lines, the third-largest carrier in the US
  2. 2 a military vehicle or ship that carries soldiers or equipment from one place to another an armoured personnel carrier see also aircraft carrier, people carrier See related entries: Types of boats and ships
  3. 3a person or animal that passes a disease to other people or animals but does not suffer from it See related entries: Ailments and diseases, Being ill
  4. 4a metal frame that is fixed to a bicycle and used for carrying bags See related entries: Cycling
  5. 5a person or thing that carries something Aquarius, the Water Carrier a baby carrier (= for carrying a baby on your back or in front of you)
  6. 6 (British English) = carrier bag
  7. 7a company that provides a telephone or Internet service a telecoms carrier mobile-phone carriers See related entries: Communication devices, Using the Internet
See the Oxford Advanced American Dictionary entry: carrier