\ ˈbü How to pronounce boo (audio) \

Definition of boo

 (Entry 1 of 4)

used to express contempt or disapproval or to startle or frighten


noun (1)
plural boos

Definition of boo (Entry 2 of 4)

1 : a shout of disapproval or contempt
2 : any utterance at all usually used in negative constructions never said boo


booed; booing; boos

Definition of boo (Entry 3 of 4)

intransitive verb

: to deride especially by uttering a prolonged boo

transitive verb

: to express disapproval of by booing the crowd booed the referee


noun (2)
plural boos

Definition of boo (Entry 4 of 4)

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 This has left me skeptical of all new relationships—including my new boo.— Griffin Wynne

Synonyms & Antonyms for boo

Synonyms: Noun (1)

Antonyms: Noun (1)

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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: Interjection C’mon, when the day began the Dodgers were in third place in the standings, but led the league in pitching and led all of baseball in run differential and … boo! Bill Plaschke, latimes.com, 25 May 2017 Recent Examples on the Web: Noun The one-piece has a high rise — nothing too revealing, but just a little peek-a-boo effect. Irina Grechko, refinery29.com, 28 July 2022 The stroller also includes a large UPF 50+ canopy, peek-a-boo windows and a swivel front wheel that locks for stability when jogging. Jamie Spain, Good Housekeeping, 26 July 2022 Cox Hollow has mostly nonelectric sites, with a couple electric accessible sites and a handful of bluff-top sites on its southern end that offer peek-a-boo views of the manmade lake below. Chelsey Lewis, Journal Sentinel, 21 July 2022 Adding in her special magic touch, Hailey ties in the white from the top with a peek-a-boo underwear moment. Abby Dupes, Seventeen, 29 June 2022 Show off your silhouette with skimming fabrics and peek-a-boo cutouts. Marykate Boylan, Town & Country, 7 June 2022 Notable details are asymmetry, sheer panels, peek-a-boo cutouts; the palette is black, camel, white, blush and lavender in solids and stripes. Ingrid Schmidt, The Hollywood Reporter, 16 June 2022 Thanks to social media, there are so many ways to claim your new boo. Ariana Yaptangco, Glamour, 10 June 2022 Furthermore, Vanjie spends a wild 24 hours whittling down a cast of eligible singles in the quest to find her boo. Jazz Tangcay, Variety, 16 May 2022 Recent Examples on the Web: Verb The urge to boo the Astros, who Yankees fans are convinced stole the 2017 championship from them, is so great that the Astros' series even outdrew the season-opening series against the Boston Red Sox, who are supposed to be New York's archnemesis. Matt Young, Chron, 27 June 2022 Many of the fans at Petco Park fans started to boo Harper after several seconds with Harper shouting at Snell. Richard J. Marcus, ajc, 26 June 2022 In other words, the teams didn’t give their fan bases anything to boo about. New York Times, 29 Apr. 2022 After the comment was made, attendees in the chambers began to boo and groan at the comment, as Biden paused for a brief moment and continued his address. Jordan Mendoza, USA TODAY, 2 Mar. 2022 As the building began to buzz, driven by Duke fans who stuck around to boo MSU and root on Davidson, Bingham checked back in. Chris Solari, Detroit Free Press, 19 Mar. 2022 Introduced to the Madison Square Garden crowd by Kris Kristofferson, O’Connor would soon be comforted by him when the crowd — or at least a vocal portion of it — tried to boo her offstage. Sheri Linden, The Hollywood Reporter, 25 Jan. 2022 Mets players, led by former Cub Javier Báez, became the first athletes to boo their fans, using a thumbs-down gesture to show their displeasure. Paul Sullivan, chicagotribune.com, 26 Dec. 2021 Knicks fans would love another chance to boo Young in the teams' first meeting at MSG since last season's playoffs, when Young emerged as a New York villain and the Hawks eliminated the Knicks in the opening round. Matt Eppers, USA TODAY, 25 Dec. 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'boo.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of boo


1639, in the meaning defined above

Noun (1)

1884, in the meaning defined at sense 1


1833, in the meaning defined at intransitive sense

Noun (2)

1988, in the meaning defined above

History and Etymology for boo


expressive formation; the voiced labial release and high vowel presumably heighten the suddenness of the utterance

Noun (1)

derivative of boo entry 1


derivative of boo entry 2

Noun (2)

of uncertain origin

Note: Perhaps ultimately a hypocoristic reduction of brother, applied to unrelated males, but the details are unclear.

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Cite this Entry

“Boo.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/boo. Accessed 11 Aug. 2022.

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More Definitions for boo


\ ˈbü How to pronounce boo (audio) \

Kids Definition of boo

 (Entry 1 of 3)

used to express disapproval or to startle or frighten


plural boos

Kids Definition of boo (Entry 2 of 3)

: a cry expressing disapproval


booed; booing

Kids Definition of boo (Entry 3 of 3)

: to express disapproval of with boos

More from Merriam-Webster on boo

Nglish: Translation of boo for Spanish Speakers

Britannica English: Translation of boo for Arabic Speakers


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