名詞 knockout:

1. a very attractive or seductive looking woman
   同義詞：smasher, stunner, beauty, ravisher, sweetheart, peach, lulu, looker, mantrap, dish
2. a blow that renders the opponent unconscious
   同義詞：KO, kayo

形容詞 knockout:

1. very strong or vigorous
   同義詞：hard, severe

1. Seeing the opponent was off guarded, the boxer landed a knockout punch.
   乘對手不提防，那拳擊手一下子把他擊倒了。
2. Bob's girlfriend is a knockout!
   鮑伯的女朋友真是個絕色佳人。
3. The fight was won by a knockout.
   這場拳擊以一擊將對方打倒而獲勝。
4. A knockout punch.
   猛烈的一拳

knock.out

n.（名詞）

The act of knocking out.
擊倒的動作
The state of being knocked out.
被擊倒：被擊倒的狀態(tài)
A blow that knocks out an opponent.
把對手擊倒的一拳
Sports
【體育運(yùn)動】
A victory in boxing in which one`s opponent is unable to rise from the canvas within a specified time after being knocked down.
判敗擊倒：在拳擊比賽中，對手在被擊倒后的一定時間未能從拳臺上站起來而取得的勝利
The act of winning a boxing match in this way:
擊倒對手的一拳：以這種方式贏得拳擊比賽的動作：
例句：
won the fight by a knockout.
把對手一拳擊倒對方而獲得勝利

Slang A strikingly attractive or impressive person or thing.
【俚語】 引人注目的人（或物），或令人印象深刻的人
adj.（形容詞）
Capable of knocking out:
足以擊倒的，猛烈的：
例句：
a knockout punch.
猛烈的一拳