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

Conference publications For the second consecutive year, the team participated in the joint IEEE Publication Services and Products Board/IEEE Conferences Committee’s ad hoc committee on conference publication quality. — IEEE Spectrum, 30 July 2026

Peyton also sits on the Legislature’s Anti-Crime, DEI, Justice & Law Enforcement and Land Use committees, as well as several ad hoc committees. — Ilana Arougheti, Kansas City Star, 27 July 2026

Earlier this year, Dutra said during a board meeting his ad hoc committee considered adding a transit rider to the board. — Steve Scauzillo, Daily News, 16 July 2026

Second, Northwestern assigned an ad hoc committee to investigate me; but, after six months of investigation, the committee exonerated me, recommended no punishment and affirmed my right to academic freedom. — Literary Hub, 14 July 2026

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