Companion

Companion may refer to:

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