一战 yīzhàn World War I Origin Definitions Defs Strokes Stroke Words Sentences Sents 一 yī numeral abbreviation of 第一 dìyī first occupying the lead position in a sequence, order, or ranking; the first战 戰 zhàn noun abbreviation of 大战 大戰 dàzhàn war large-scale war; big clash; fierce competition