戦死 (senshi) means “death in battle” | MotiTan Japanese Dictionary

More examples

家族は新聞で、その兵士の戦死を知りました。ka zoku wa shin bun de so no hei shi no sen shi o shi ri ma shi ta

The family learned from the newspaper that the soldier had died in battle.

Refers to a death directly caused by participation in armed fighting, with the battle as the defining setting.

戦没senbotsu: A formal term for a death caused by war or military action.

戦場で戦闘中に命を失うこと。sen jō de sen tō chū ni inochi o ushina u ko to

The Sino-Japanese compound 戦死 (senshi, "death in battle") combines 戦 (sen, "battle") and 死 (shi, "death") to denote dying in combat.

The term 戦死 (senshi) has a formal, solemn tone and is more characteristic of historical or military writing than of casual conversation.