Synonyms of ad hoc

ad hoc

adjective

as in impromptu

made or done without previous thought or preparation

upon learning that it was her birthday, we had an ad hoc celebration right there in the restaurant

Synonyms & Similar Words

• impromptu
• improvised
• improvisational
• unprepared
• down and dirty
• spur-of-the-moment
• extemporaneous
• unauthorized
• extemporary
• informal
• offhand
• unstudied
• unplanned
• unrehearsed
• extempore
• unconsidered
• snap
• spontaneous
• automatic
• unpremeditated
• off-the-cuff
• offhanded
• ad-lib
• impulsive
• unscripted
• instinctive
• involuntary
• casual
• cursive
• ill-advised
• half-baked
• half-cocked

Antonyms & Near Antonyms

• prepared
• planned
• considered
• rehearsed
• premeditated
• premeditative
• intentional
• intended
• deliberate

Example Sentences

Recent Examples of ad hoc

The current ad hoc system relies too heavily on the United States to mobilize people and resources to respond to each new emergency. — Stephanie Psaki, Foreign Affairs, 18 Sep. 2026

Art thieves in Europe are committing more violent robberies and specialist gangs have been replaced by ad hoc ​opportunists recruited through social media, pan-European police body Europol said last month. — Reuters, NBC news, 8 Sep. 2026

The novel opens on Claire’s ad hoc wake from the perspective of Mara (point 1), an early middle aged tutor of private school teens who seems to drift through her own life, letting the current do the work. — Emily Temple, Literary Hub, 8 Sep. 2026

In August, an ad hoc committee made up of former MMSD commissioners recommended Jacobs, which outscored and underbid Veolia. — Mary Spicuzza, jsonline.com, 4 Sep. 2026

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