noun
victor; conqueror; victorious troops
Refers to the winning side in a war or conflict; can be an individual or a group.
戦勝者は敗者に厳しい条件を課した。
The victors imposed harsh terms on the defeated.
彼は戦勝者として故郷に帰った。
He returned to his hometown as a conqueror.
敗者 means 'loser' or 'defeated person', the opposite of 戦勝者.
Compound of 戦 (sen, 'war') + 勝 (shō, 'victory') + 者 (sha, 'person'). The reading is on'yomi.