1

KO

play
noun \ (ˌ)kā-ˈō , ˈkā-(ˌ)ō \

Definition of KO

Examples of ko in a Sentence

  1. He scored a KO in the second round.

Origin and Etymology of ko

knock out


2

KO

verb

Definition of KO

KO'd play \kā-ˈōd, ˈkā-(ˌ)ōd\; KO'ing play \kā-ˈō-iŋ, ˈkā-(ˌ)ō-iŋ\
transitive verb
:to knock out (as in boxing)

Examples of ko in a Sentence

  1. He was KO'd in the second round.

First Known Use of ko

1926


KO Defined for English Language Learners

KO

verb

Definition of KO for English Language Learners

  • boxing : to knock (an opponent) out


Learn More about ko


Seen and Heard

What made you want to look up KO? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

all at once

Get Word of the Day daily email!

Test Your Vocabulary

Challenging Vocabulary Quiz Returns!

  • stylized-drawing-of-woman-pole-vaulting-across-gap-to-get-trophy
  • Which is a synonym of fuliginous?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!