boo.
A loud exclamation intended to scare someone. Usually used when one has been hidden from the target, and then appears unexpectedly.
Meaning & usage
A loud exclamation intended to scare someone. Usually used when one has been hidden from the target, and then appears unexpectedly.
An exclamation used by a member of an audience, as at a stage play or sporting event, to indicate derision or disapproval.
Where this word comes from
From earlier (15c.) boh, coined to create a loud and startling sound. Compare Middle English bus! (“bang!”, interjection), Latin boō (“cry aloud, roar, shout”, verb), Ancient Greek βοάω (boáō, “shout”, verb).
A derisive shout of the word 'boo' made to indicate disapproval.
Where this word comes from
From earlier (15c.) boh, coined to create a loud and startling sound. Compare Middle English bus! (“bang!”, interjection), Latin boō (“cry aloud, roar, shout”, verb), Ancient Greek βοάω (boáō, “shout”, verb).
To shout extended boos derisively.
When he took the podium, the crowd booed.
To shout extended boos at, as a form of disapproval or derision.
The protesters loudly booed the visiting senator.
Where this word comes from
From earlier (15c.) boh, coined to create a loud and startling sound. Compare Middle English bus! (“bang!”, interjection), Latin boō (“cry aloud, roar, shout”, verb), Ancient Greek βοάω (boáō, “shout”, verb).
A close acquaintance or significant other.
Where this word comes from
From beau, from French beau. First appears c. 1988 in the Washington Post: See the cite below.
Cannabis.
Where this word comes from
Of unknown origin, possibly from boojum, from a fancied resemblance of the plants. First appears c. 1959 in Esquire Magazine.
To make a sound characteristic of cattle; to moo.
Where this word comes from
Likely onomatopoeic.
A tail feather from an ostrich.
Where this word comes from
Dubious; perhaps adaptation of French beau (“beautiful”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.