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 A domestic partnership is an intimate relationship between people, usually couples, who cohabitation, live together and share a common domestic life but who are not marriage, married (to each other or to anyone else). People in domestic partner ...

, akin to a spouse *

Sober companion A sober companion is a human services-related career path with the goal of helping the client maintain total abstinence or harm reduction from any addiction, and to establish healthy routines at home or after checking out of a residential treatment ...

, an addiction treatment coach *

Companion (caregiving) In health care and caregiving, a companion, sitter, or private duty is a job title for someone hired to work with one patient (or occasionally two). Companions work in a variety of settings, including nursing homes, assisted living facilities, hosp ...

, a caregiver, such as a nurse assistant, paid to give a patient one-on-one attention

Historically

* A

concubine Concubinage is an interpersonal relationship, interpersonal and Intimate relationship, sexual relationship between two people in which the couple does not want to, or cannot, enter into a full marriage. Concubinage and marriage are often regarde ...

, a long-term sexual partner not accorded the status of marriage *

Lady's companion A lady's companion was a woman of genteel birth who lived with a woman of rank or wealth as Affinity (medieval), retainer. The term was in use in the United Kingdom from at least the 18th century to the mid-20th century but it is now archaism, arc ...

, a historic term for a genteel woman who was paid to live with a woman of rank or wealth *

Companion cavalry The Companions (, , ''hetairoi'') were the elite heavy cavalry of the Macedonian army from the time of King Philip II of Macedon, achieving their greatest prestige under Alexander the Great, and regarded as the first or among the first shock ca ...

, 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 Companions of the Prophet () were the Muslim disciples and followers of the Islamic prophet Muhammad who saw or met him during his lifetime. The companions played a major role in Muslim battles, society, hadith narration, and governance ...

, 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 James Henry Leigh Hunt (19 October 178428 August 1859), best known as Leigh Hunt, was an English critic, essayist and poet. Hunt co-founded '' The Examiner'', a leading intellectual journal expounding radical principles. He was the centre ...

Music

* ''Companion'', a 1999 album by

Patricia Barber Patricia Barber (born November 8, 1955) is an American songwriter, composer, singer, and pianist. Biography Barber's father Floyd was a jazz saxophonist who played with Bud Freeman and Glenn Miller. She played saxophone and piano from a young a ...

* "Companion", a song by Nikki Lane from the 2017 album ''

Highway Queen ''Highway Queen'' is the third studio album by American outlaw country singer Nikki Lane. It was released on February 17, 2017 on New West Records. Background and recording Lane's previous album '' All or Nothin suggests a more hipster si ...

'' * ''Companions'' (album), by Raphe Malik, 2002 * ''Companions'' (EP), by Mixtapes, 2011

Other uses

Bearhawk Companion The Bearhawk Companion is an American amateur-built aircraft, designed by Bob Barrows, that is produced by Bearhawk Aircraft of Austin, Texas, introduced in August 2019. The aircraft is supplied as a kit for amateur construction, with first ...

, an American homebuilt aircraft design, with two seats in side-by-side configuration *

Companion 21 The Companion 21 is an American trailerable sailboat that was designed by Aborn Smith Jr. and first built in 1981.Henkel, Steve: ''The Sailor's Book of Small Cruising Sailboats'', page 94. International Marine/McGraw-Hill, 2010. Production ...

, an American sailboat design *

Companion (ship) In the architecture of a ship, a companion or companionway is a raised and windowed hatchway in the ship's deck, with a ladder leading below and the hooded entrance-hatch to the main cabins. A companionway may be secured by doors or, commonly i ...

, an architectural feature of ships * Companion animal, a

pet A pet, or companion animal, is an animal kept primarily for a person's company or entertainment rather than as a working animal, livestock, or a laboratory animal. Popular pets are often considered to have attractive/ cute appearances, inte ...

animal kept for companionship **

Companion parrot A companion parrot is a parrot kept as a pet that interacts abundantly with its human counterpart. Generally, most species of parrot can make excellent companions, but must be carefully managed around children and other common pet species like do ...

, a pet parrot that interacts with its owner *

Companion matrix In linear algebra, the Frobenius companion matrix of the monic polynomial p(x)=c_0 + c_1 x + \cdots + c_x^ + x^n is the square matrix defined as C(p)=\begin 0 & 0 & \dots & 0 & -c_0 \\ 1 & 0 & \dots & 0 & -c_1 \\ 0 & 1 & \dots & 0 & -c_2 \\ \ ...

, a matrix with a specific relation to its characteristic polynomial ''p'' *

Companion planting Companion planting in gardening and agriculture is the planting of different crops in proximity for any of a number of different reasons, including Weed control, weed suppression, pest control, pollination, providing habitat for beneficial ins ...

, planting of different crops in close physical proximity * "Companion series", a

sister show Sister shows, also known as companion series, are two or more television series which exist in the same fictional universe and which may have crossovers. They differ to a degree from spin-offs, in that they are established independently from one ...

in television *

Companion star A binary star or binary star system is a system of two stars that are gravitationally bound to and in orbit around each other. Binary stars in the night sky that are seen as a single object to the naked eye are often resolved as separate stars us ...

, a star in a binary system *

Companion weapon The term companion weapon is used in historical European martial arts to refer to an item used in conjunction with the larger weapon in the non-sword hand while fencing with a rapier or sword. The popular companion weapon forms include: *sword and ...

, an object held in the non-sword hand while fencing * A

handbook A handbook is a type of reference work, or other collection of instructions, that is intended to provide ready reference. The term originally applied to a small or portable book containing information useful for its owner, but the ''Oxford Eng ...

guide book A guide book or travel guide is "a book of information about a place designed for the use of visitors or tourists". It will usually include information about sights, accommodation, restaurants, transportation, and activities. Maps of varying det ...

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 ''The Oxford Companion to Music'' is a music reference book in the series of Oxford Companions produced by the Oxford University Press. It was originally conceived and written by Percy Scholes and published in 1938. Since then, it has undergo ...

'' * 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

order Order, ORDER or Orders may refer to: * A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica * Categorization, the process in which ideas and objects are recognized, differentiated, and understood ...

s {{disambiguation