Knockout ( noun , adjective , verb )

(As a noun)

Knockout ( noun )

1. A defeat in a competition or contest that eliminates a participant.
2. An instance of rendering someone unconscious.

Origin:

Early 19th century (as a verb in the sense "knock unconscious"): of uncertain origin, possibly an alteration of knap "strike".

Examples:

1. He was knocked out in the first round of the boxing match.
2. The team lost in the first round of the tournament, it was a knockout.
3. The boxer suffered a knockout in the tenth round.
4. The fighter was knocked out cold.
5. The knockout punch came as a surprise.

(As an adjective)

Knockout ( adjective )

Extremely attractive or impressive.

Origin:

Early 19th century (as a verb in the sense "knock unconscious"): of uncertain origin, possibly an alteration of knap "strike".

Examples:

1. She was a knockout in her new dress.
2. The new car is a knockout.
3. He looked like a knockout in his new suit.
4. The building is a knockout.
5. The painting was a knockout.

(As a verb)

Knockout ( verb )

1. To knock unconscious.
2. To eliminate in a competition or contest.

Origin:

Early 19th century (as a verb in the sense "knock unconscious"): of uncertain origin, possibly an alteration of knap "strike".

Examples:

1. He was knocked out in the first round of the boxing match.
2. The boxer was knocked out in the tenth round.
3. He was knocked out by a punch to the jaw.
4. The fighter was knocked out in the first round.
5. The boxer was knocked out in the ring.