companion

Companion may refer to:

Relationships

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

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

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

"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

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