Companion

Companion may refer to:

Relationships

Currently

• Any of several interpersonal relationships such as friend or acquaintance
• A domestic partner, akin to a spouse
• Sober companion, an addiction treatment coach
• Companion (caregiving), a caregiver, such as a nurse assistant, paid to give a patient one-on-one attention

Historically

• A concubine, a long-term sexual partner not accorded the status of marriage
• Lady's companion, a historic term for a genteel woman who was paid to live with a woman of rank or wealth
• Companion cavalry, the elite cavalry of Alexander the Great
• Foot Companion, the primary type of soldier in the army of Alexander the Great
• Companions of William the Conqueror, those who took part in the Norman conquest of England
• Muhammad's companions, the Sahaba, the friends who surrounded the prophet of Islam

Film and television

• Companion (film), a 2025 American film
• Companion (Doctor Who), a character who travels with the Doctor in the TV series Doctor Who
• Companion (Firefly), a type of courtesan and entertainer in the TV series Firefly
• The Companion (film), a 2015 Cuban film
• The Companion, a South Korean film of 1984
• The Companion, a 1994 Universal Television film

Literature

• "The Companion" (fairy tale), a Norwegian fairy tale
• "The Companion" (short story), a story by Agatha Christie in her 1932 collection The Thirteen Problems
• The Companion, an 1828 literary journal published by Leigh Hunt

Music

• Companion, a 1999 album by Patricia Barber
• "Companion", a song by Nikki Lane from the 2017 album Highway Queen
• Companions (album), by Raphe Malik, 2002
• Companions (EP), by Mixtapes, 2011

Other uses

• Bearhawk Companion, an American homebuilt aircraft design, with two seats in side-by-side configuration
• Companion 21, an American sailboat design
• Companion (ship), an architectural feature of ships
• Companion animal, a pet animal kept for companionship
  • Companion parrot, a pet parrot that interacts with its owner
• Companion matrix, a matrix with a specific relation to its characteristic polynomial p
• Companion planting, planting of different crops in close physical proximity
• "Companion series", a sister show in television
• Companion star, a star in a binary system
• Companion weapon, an object held in the non-sword hand while fencing
• A handbook or guide book or compendium e.g. Star Trek: Deep Space Nine Companion or The Oxford Companion to Music
• A member of a Holy Royal Arch chapter
• A rank within many state-awarded orders