K (disambiguation)

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K is the eleventh letter of the Latin alphabet.

K may also refer to:

General uses[edit]


In fiction and literature[edit]


Films and TV[edit]


  • K, the protagonist of Franz Kafka's 1926 novel The Castle
  • K, a character in the manga and anime Gravitation
  • K, the main character in the novel by the same name by Bernardo Kucinski
  • K, the main character in the TV series Robotto Keiji (Robot Detective)
  • K, Todd and Riley's adoptive superspy mother on the Disney program The Replacements
  • K, the protagonist played by John Abraham in No Smoking
  • K, a character in Natsume Soseki's novel Kokoro
  • K, a character in the visual novel Zero Escape: Virtue's Last Reward
  • K′, also known as "K Dash" or "K Prime", a King of Fighters character
  • Agent K, the character played by Tommy Lee Jones in Men in Black, Men in Black II, and Men in Black 3
  • Joseph K., the protagonist of Kafka's 1925 novel, The Trial


In mathematics[edit]

  • and , the complete and complete bipartite graph
  • K-theory, a branch of topology and algebra
  • Blackboard bold is a commonly used symbol for a field, as an abbreviation of the German Körper.

In music[edit]

  • K, Köchel catalogue, chronological catalogue of compositions by Wolfgang Amadeus Mozart
  • K Records, independent record company based in Olympia, Washington
  • K (album), 1996 album by Kula Shaker


In politics[edit]

As a symbol or abbreviation[edit]


  • k, symbol of the kilo- prefix in the SI and other systems of unit that denotes multiples of 1000
  • K, SI symbol for kelvin, the SI unit of thermodynamic temperature
  • K (upper case), informal abbreviation for kibibyte or 1024 bytes
  • k (lower case), informal abbreviation for kilobyte or 1000 bytes
  • k, kilobit (more correctly kbit)
  • k, informal abbreviation for kilometre (SI symbol: km)

In the natural sciences[edit]

In the physical sciences[edit]

See also[edit]