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

Again following the lead of EV start-ups such as Tesla and Rivian, legacy automakers are shifting from these ad hoc, tiny control units to one or two big computers that run all of the software in their vehicles—and, in turn, require much more RAM. — Matteo Wong, The Atlantic, 19 Aug. 2026

For example, the house has organized ad hoc wine tastings and vineyard tours in France for its VVIP clients. — George Nelson, ARTnews.com, 13 Aug. 2026

Chinese funds are also doled out on an ad hoc basis with little transparency. — Eghosa E. Osaghae, Foreign Affairs, 11 Aug. 2026

After a month of mulling over the proof’s ideas, Levy clued in to the reason that their ad hoc method worked. — Lyndie Chiou, Scientific American, 5 Aug. 2026

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