title: Companion
text: # 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 (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
  