A was a samurai with no lord or master during the feudal period (1185–1868) of Japan. A samurai became masterless from the death or fall of his master, or after the loss of his master's favor or privilege.

Ronin (stylized as RONIN) is a 2015 turn-based action platformer video game developed by Polish indie developer Tomasz Waclawek, designer at polish indie studio Flying Wild Hog, and published by Devolver Digital. It was released for Microsoft Windows on May 27, 2015 into Steam Early Access and left it on June 30, 2015. A later update introduced builds for OS X and Linux on October 14, 2015.