Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary
1

boo

play
interjection \ˈbü\

Definition of boo

  1. —used to express contempt or disapproval or to startle or frighten



Origin and Etymology of boo

Middle English bo


First Known Use: 15th century


2

boo

noun

Simple Definition of boo

  • : a sound that people make to show they do not like or approve of someone or something

  • : any sound at all

Source: Merriam-Webster's Learner's Dictionary

Full Definition of boo

plural

boos

  1. 1 :  a shout of disapproval or contempt

  2. 2 :  any utterance at all —usually used in negative constructions <never said boo>

Examples of boo in a sentence

  1. A chorus of boos was heard after the shot missed the goal.

  2. The announcement was greeted by a mixture of boos and cheers.



1801

First Known Use of boo

1801


3

boo

verb

Simple Definition of boo

  • : to show dislike or disapproval of someone or something by shouting “Boo” slowly

Source: Merriam-Webster's Learner's Dictionary

Full Definition of boo

  1. intransitive verb
  2. :  to deride especially by uttering a prolonged boo

  3. transitive verb
  4. :  to express disapproval of by booing <the crowd booed the referee>

Examples of boo in a sentence

  1. Many people in the crowd booed when the announcement was made.

  2. Many people in the crowd booed the announcement, but a few people cheered it.



1884

First Known Use of boo

1884


BOO Defined for Kids

1

boo

play
interjection \ˈbü\

Definition of boo for Students

  1. —used to express disapproval or to startle or frighten




2

boo

play
noun

Definition of boo for Students

plural

boos

  1. :  a cry expressing disapproval




3

boo

play
verb

Definition of boo for Students

booed

booing

  1. :  to express disapproval of with boos





Seen and Heard

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

WORD OF THE DAY

in the capacity or character of

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

fox-in-summer-forest

Which of these is a synonym of inchoate?

experimental formless frightening massive
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