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Synonyms

boo

1 American  
[boo, boh] / bu, boʊ /

noun

  1. Slang. marijuana.

boo 2 American  
[boo] / bu /

noun

Slang.

  1. one's boyfriend or girlfriend.

boo 3 American  
[boo] / bu /

interjection

  1. (used to express contempt or disapprobation or to startle or frighten.)

noun

plural

boos

  1. an exclamation of contempt or disapproval.

    a loud boo from the bleachers.

verb (used without object)

booed, booing

  1. to cry boo in derision.

verb (used with object)

booed, booing

  1. to show disapproval of by booing.

boo British  
/ buː /

interjection

  1. an exclamation uttered to startle or surprise someone, esp a child

  2. a shout uttered to express disgust, dissatisfaction, or contempt, esp at a theatrical production, political meeting, etc

  3. is extremely timid or diffident

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. to shout "boo" at (someone or something), esp as an expression of disgust, dissatisfaction, or disapproval

    to boo the actors
"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Usage

What else does boo mean? Boo is the sound we pretend ghosts make as well as a sound we make when we really don’t like something.Boo is also an affectionate term for one's significant other, similar to bae.

Etymology

Origin of boo1

First recorded in 1955–60; of uncertain origin

Origin of boo1

1985–90; of uncertain origin; possibly an alteration of French beau “boyfriend, admirer”

Origin of boo1

First recorded in 1630–40; expressive formation

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A chorus of boos—boo-birds were on this team all afternoon—pummeled the field like a hailstorm.

From The Wall Street Journal

Any time the word Alabama was mentioned, Indiana fans booed and asserted homefield advantage.

From Los Angeles Times

As the full-time whistle went at Anfield, a goalless draw against Leeds United prompted some boos from sections of the home support.

From BBC

"They weren't just booed off at full-time. The fans waited in the stadium to continue to boo them. They've gone backwards."

From Barron's

Certainly, the United fans who booed their team off at full-time expect better.

From BBC

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.