Dictionary/聖戦せいせんSeisen聖戦 (Seisen) is a Japanese noun meaning “holy war, crusade”.Meaningsnounholy war; crusadeKanji in 聖戦聖holy戦warRelated words戦うto make war (on)戦war作戦tactics戦争war戦地front (in battle)挑戦challenge戦場battlefield緒戦beginning of hostilities戦闘battle戦士soldier戦力war potential戦略strategy