\Ro"nin"\, n. [Jap. r[=o]-nin, fr. Chin. lang profligate, lawless + j[^e]n (old sound n[=i]n) man.] In Japan, under the feudal system, a samurai who had renounced his clan or who had been discharged or ostracized and had become a wanderer without a lord; an outcast; an outlaw.