—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 WynneSynonyms
Examples 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
Linda McIntosh, San Diego Union-Tribune, 15 Mar. 2024
Volunteer yourself to help with X, Y and Z accommodations if that lightens the family’s workload, without saying boo about the couple’s choices.
—Carolyn Hax, Washington Post, 18 Jan. 2024
Lynette Rice, Deadline, 8 Oct. 2024
The crowd gathered around cheered loudly except for a chorus of boos as Las Vegas’ buses pulled up.
—Sarah Kelly, The Denver Post, 6 Oct. 2024
Louisa Thomas, The New Yorker, 19 Oct. 2024
Some in the audience booed him from breaking with the traditional tone of the evening.
—Ted Johnson, Deadline, 18 Oct. 2024
See all Example Sentences for boo 
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Interjection
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
Volunteer yourself to help with X, Y and Z accommodations if that lightens the family’s workload, without saying boo about the couple’s choices.
—Carolyn Hax, Washington Post, 18 Jan. 2024
Noun
Night one, cha cha (23 out of 40, boo!); Night two (29 out of 40) Total: 52
Olympic rugby player Ilona Maher with partner Alan Bersten.
—Lynette Rice, Deadline, 8 Oct. 2024
The crowd gathered around cheered loudly except for a chorus of boos as Las Vegas’ buses pulled up.
—Sarah Kelly, The Denver Post, 6 Oct. 2024
Verb
After striking out four times for a loss in late April, the crowd in Yankee Stadium had even booed the captain.
—Louisa Thomas, The New Yorker, 19 Oct. 2024
Some in the audience booed him from breaking with the traditional tone of the evening.
—Ted Johnson, Deadline, 18 Oct. 2024
See all Example Sentences for boo
Dictionary Entries Near boo
Cite this Entry
“Boo.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/boo. Accessed 5 Nov. 2024.
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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