Ratchet may refer to:
Devices
Ratchet (device), a mechanical device that allows movement in only one direction
Ratchet, metonomic name for a socket wrench incorporating a ratcheting device
Ratchet (instrument), a musical instrument and a warning device
Film and television
Ratchet (Robots), a character in the film Robots
Ratchet, a character in the Widget the World Watcher television series
Ratchet, a character in the Red Lantern Corps DC Comics series
Ratchet (Transformers), a character
Ratchet, a 1986 thriller film by John Johnson
Video games
Ratchet (Ratchet & Clank), a video game character
Ratchet: Deadlocked, a video game
Music
"Ratchet" (Bloc Party song), 2013
Ratchet (Shamir album), 2015
Ratchet, another name for the RnBass genre
Other
Ratchet option, a financial derivative also known as cliquet option
Double Ratchet Algorithm, an algorithm for managing cryptographic keys
Ratchet (slang), a derogatory term
Ratchet Gearloose, a Disney character, paternal grandfather of Gyro Gearloose
See also
Nurse Ratched
Ratched (TV series)