一世 Traditional form: 一世 Pinyin (reading): yīshì Definitions: generation period of 30 years one's whole lifetime lifelong age era times the whole world the First (of numbered European kings) Characters: 一 - one; a, an; alone 世 - generation, era, age; world Traditional characters: 一 - one; a, an; alone 世 - generation, era, age; world