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Synonyms

boo

1 American  
[boo] / bu /

interjection

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


noun

  • boos
    plural
  1. an exclamation of contempt or disapproval.

    a loud boo from the bleachers.

verb (used without object)

  • boos,
    present (3rd person singular)
  • booed,
    past participle,  past
  • booing
    present participle
  1. to cry boo in derision.

verb (used with object)

  • boos,
    present (3rd person singular)
  • booed,
    past participle,  past
  • booing
    present participle
  1. to show disapproval of by booing.

boo 2 American  
[boo, boh] / bu, boʊ /

noun

  1. Slang. marijuana.


boo 3 American  
[boo] / bu /

noun

Slang.
  1. one's boyfriend or girlfriend.


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.

Other Word Forms

Inflected Forms

Nouns

Participles

Conjugated Forms

Present

Past

Future

Etymology

Origin of boo1

First recorded in 1630–40; expressive formation

Origin of boo2

First recorded in 1955–60; of uncertain origin

Origin of boo3

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

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.

See Examples For:

But it’s too late when he at least provides something to boo at.

From The Wall Street Journal ● Sep. 10, 2026

“An enchanted hideaway in a coveted location with inviting outdoor retreats and peek a boo views to Downtown Los Angeles create an idyllic setting,” the listing added.

From MarketWatch ● Jul. 29, 2026

Perhaps the organizers thought the crowd wouldn’t dare boo during a patriotic hymn.

From Salon ● Jun. 11, 2026

An audience can cheer and they can also all boo, and I have not forgotten that.

From Los Angeles Times ● May 19, 2026

I slap the tea tray down without saying boo or squat and left them women to fend for they ownselfs.

From "Girls Like Us" by Gail Giles

Days before, he delivered a characteristically crude address that singled out CNN anchor Kaitlan Collins in front of a hostile crowd, eliciting angry boos and vicious chants.

From Salon ● Oct. 6, 2026

However, footage of the victory ceremony afterwards showed ceremonial officials struggling to raise South Korea's flag on the flagpole, sparking boos from Korean fans.

From Barron's ● Oct. 4, 2026

The boos started late in the first half, with the Packers trailing 17-7, and got louder and more frequent as the game — and the team’s woes — continued.

From Los Angeles Times ● Sep. 25, 2026

Speaking Spanish during media interviews even helped turn some Mexican boos into cheers.

From BBC ● Sep. 13, 2026

I was covering Wimbledon, the world’s premier tennis competition and one of the few events I go to where the crowd never boos and no one is drunk in the parking lot.

From "Tuesdays with Morrie" by Mitch Albom

His supporters in the audience booed at the rest of the council.

From The Wall Street Journal ● Oct. 1, 2026

When incumbent Sen. Roger Marshall stepped to the microphone at last weekend’s Kansas State Fair debate, hundreds of those gathered booed, hissed and jeered.

From The Wall Street Journal ● Sep. 21, 2026

It followed Littler also being booed during his win against home favourite Danny Noppert on Friday.

From BBC ● Sep. 20, 2026

This time, they loudly booed the French prime minister, Sébastien Lecornu, who was meeting privately with the mayor of Le Porge.

From Los Angeles Times ● Aug. 30, 2026

“Sorry!” said Flint as the crowd below booed.

From "Harry Potter And The Prisoner Of Azkaban" by J.K. Rowling

In June, he told his colleagues — and a booing audience — that he had a long history of supporting park spaces.

From Los Angeles Times ● Oct. 1, 2026

By now long since deaf, he asked if they were booing him.

From The Wall Street Journal ● Sep. 16, 2026

“Ted, you suck! Ted, you suck!” several hundred students chanted for nearly 10 minutes on Saturday morning, standing behind the Republican and booing as Davis attempted to conduct a one-on-one interview.

From Salon ● Sep. 15, 2026

"The booing and disappointment from Liverpool supporters is something I'm absolutely able to shoulder. I can understand it, in my own way," he said.

From BBC ● Aug. 23, 2026

People noticed and gave them dirty looks, but the only booing during the game was when the refs made calls in favor of Armstead Academy’s team.

From "Here to Stay" by Sara Farizan

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