In card games, the highest or lowest card depending on the game.
ポーカーでエースが一番強いカードだ。
In poker, the ace is the strongest card.
If you draw an ace in cards, your chances of winning are high.
ace (player); star player; top performer
Refers to the best player on a team, especially in sports like baseball, or more broadly to an outstanding person in any field.
彼はチームのエースとして活躍している。
He is performing well as the ace of the team.
営業部のエースが今月もトップの成績を収めた。
The ace of the sales department achieved the top results again this month.
In tennis and similar sports, a serve that the opponent cannot return. Often referred to as サービスエース.
See also: サービスエース
彼は試合で10本のエースを決めた。
He hit 10 aces in the match.
彼は三年生になってチームのエースになった。
He became the team's ace when he was a third-year student.
She scored an ace with her serve.
エース is the far more common word for the ace card in card games, while ポイント is a rare, old-fashioned synonym for the same card.
サービスエース specifically means an unreturnable tennis/volleyball serve, while エース alone can also mean a card or a star player.
エース is the modern loanword for 'ace' used in sports and everyday card talk, while 一 is the older, more formal term for the ace in traditional Japanese card games.
Used because playing cards like the ace (エース) are thin, flat objects, which are typically counted with 枚 (まい).
ace (serve)
return ace; unhittable return
most reliable relief pitcher; ace reliever
ace spiker (volleyball)
ace spiker
From English 'ace'.