early 14c., "body of individuals born about the same period" (usually 30 years), from Old French generacion (12c.) and directly from Latin generationem (nominative generatio) "generating, generation," noun of action from past participle stem of generare "bring forth" (see genus). Meanings "act or process of procreation," "process of being formed," "offspring of the same parent" are late 14c.
Generation gap first recorded 1967; generation x is 1991, from Douglas Coupland book of that name; generation y attested by 1994. Related: Generational. Adjectival phrase first-generation, second-generation, etc. with reference to U.S. immigrants is from 1896.
generation gen·er·a·tion (jěn'ə-rā'shən)
A form or stage in the life cycle of an organism.
All of the offspring that are at the same stage of descent from a common ancestor.
The average interval of time between the birth of parents and the birth of their offspring.
A group of individuals born and living about the same time.
A group of generally contemporaneous individuals regarded as having common cultural or social characteristics and attitudes.
The act or process of generating; origination, production, or procreation.