stereotype (n.)

1798, "method of printing from a plate," from French stéréotype (adj.) "printed by means of a solid plate of type," from Greek stereos "solid" (see stereo-) + French type "type" (see type (n.)). Meaning "a stereotype plate" is from 1817. Meaning "image perpetuated without change" is first recorded 1850, from the verb in this sense. Meaning "preconceived and oversimplified notion of characteristics typical of a person or group" is recorded from 1922 (Walter Lippmann, "Public Opinion").

1804, "to cast a stereotype plate," from stereotype (n.). From 1819 in the figurative sense "fix firmly or unchangeably." By 1953 as "assign preconceived and oversimplified notion of characteristics typical of a person or group." Related: Stereotyped; stereotyping.