noun
General term for a person in charge, such as a workplace superior, team leader, or head of a group. Casual and widely used.
新しいボスはとても厳しい。
The new boss is very strict.
彼はプロジェクトのボスとしてチームをまとめた。
He brought the team together as the project leader.
noun
In video games, a powerful enemy, usually encountered at the end of a stage or level.
このゲームの最後のボスは倒すのがとても難しい。
The final boss of this game is very hard to defeat.