Companion may refer to:

Relationships

Currently

* Any of several

interpersonal relationship In social psychology, an interpersonal relation (or interpersonal relationship) describes a social association, connection, or affiliation between two or more people. It overlaps significantly with the concept of social relations, which a ...

s 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 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 caregive ...

, 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 A compendium ( compendia or compendiums) is a comprehensive collection of information and analysis pertaining to a body of knowledge. A compendium may concisely summarize a larger work. In most cases, the body of knowledge will concern a specific ...

e.g. ''Star Trek: Deep Space Nine Companion'' or '' The Oxford Companion to Music'' * A member of a

Holy Royal Arch The Royal Arch is a degree of Freemasonry. The Royal Arch is present in all main masonic systems, though in some it is worked as part of Craft ('mainstream') Freemasonry, and in others in an Masonic appendant bodies, appendant ('additional') ord ...

chapter * A rank within many state-awarded orders {{disambiguation