—used to express contempt or disapproval or to startle or frighten
plural boos
1
: a shout of disapproval or contempt
2
: any utterance at all
—usually used in negative constructions
never said boo
booed; booing; boos
: to deride especially by uttering a prolonged boo
: to express disapproval of by booing
the crowd booed the referee
plural boos
US slang
: a romantic partner : sweetheart, honey
Your parents might keep a sharp eye on potential partners and your besties may lay down difficult "friend tests," but only one real opinion on your new boo truly matters: what your dog thinks of them.—
Jaime Lees
Jaime LeesThis has left me skeptical of all new relationships—including my new boo.—Griffin Wynne
Griffin WynneExamples of boo in a Sentence
Noun (1)
A chorus of boos was heard after the shot missed the goal.
The announcement was greeted by a mixture of boos and cheers.
Verb
Many people in the crowd booed when the announcement was made.
Many people in the crowd booed the announcement, but a few people cheered it.
Recent Examples on the Web
Wesley Stenzel, EW.com, 17 Apr. 2025
Highlights include a costume parade (for kids and parents), a Purim story and boo Haman and songs.
—Linda McIntosh, San Diego Union-Tribune, 15 Mar. 2024
Tess Kenny, Chicago Tribune, 15 Apr. 2025
Stroman then walked off the soggy mound to the chorus of loud boos from a light crowd before undergoing X-rays at Yankee Stadium.
—Gary Phillips, New York Daily News, 12 Apr. 2025
Alfred Konuwa, Forbes.com, 18 Apr. 2025
But this wasn't the case, and the fans turned on the former Shield member, eventually resulting in him being booed at the main event of WrestleMania 34.
—Thomas G. Moukawsher, MSNBC Newsweek, 17 Apr. 2025
See All Example Sentences for boo
Examples are automatically compiled from online sources to
show current usage.
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Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
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Interjection
Williams also recalled witnessing the Super Bowl crowd boo Taylor Swift when she was shown on the jumbotron cheering on her boyfriend, Kansas City Chiefs player Travis Kelce.
—Wesley Stenzel, EW.com, 17 Apr. 2025
Highlights include a costume parade (for kids and parents), a Purim story and boo Haman and songs.
—Linda McIntosh, San Diego Union-Tribune, 15 Mar. 2024
Noun
Her comments were followed by a loud chorus of boos and shouts from the audience.
—Tess Kenny, Chicago Tribune, 15 Apr. 2025
Stroman then walked off the soggy mound to the chorus of loud boos from a light crowd before undergoing X-rays at Yankee Stadium.
—Gary Phillips, New York Daily News, 12 Apr. 2025
Verb
Even when Naomi interrupted, fans booed Bianca more than Naomi.
—Alfred Konuwa, Forbes.com, 18 Apr. 2025
But this wasn't the case, and the fans turned on the former Shield member, eventually resulting in him being booed at the main event of WrestleMania 34.
—Thomas G. Moukawsher, MSNBC Newsweek, 17 Apr. 2025
See All Example Sentences for boo
Cite this Entry
“Boo.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/boo. Accessed 2 May. 2025.
Copy CitationKids Definition
boo
1 of 2 interjection
—used to express contempt or disapproval or to startle or frighten
boo
2 of 2 noun
plural boos
1
: a shout of disapproval or contempt
2
: any sound at all
never said boo
boo
verb
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Merriam-Webster unabridged
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