American English

Definition of companion noun from the Oxford Advanced American Dictionary



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  1. 1a person or an animal that travels with you or spends a lot of time with you traveling companions Geoff was my companion on the journey. (figurative) Fear was the hostages' constant companion.
  2. 2a person who has similar tastes, interests, etc. to your own and whose company you enjoy She was a charming dinner companion. His younger brother is not much of a companion for him. They're drinking companions (= they go out drinking together).
  3. 3a person who shares in your work, pleasures, sadness, etc. We became companions in misfortune.
  4. 4a person, usually a woman, employed to live with and help someone, especially someone old or sick
  5. 5one of a pair of things that go together or can be used together A companion volume is soon to be published.
  6. 6used in book titles to describe a book giving useful facts and information on a particular subject A Companion to French Literature see also boon companion
See the Oxford Advanced Learner's Dictionary entry: companion