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

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

Increasing security cooperation between Saudi Arabia, Egypt, Pakistan, and Türkiye could become the nucleus of a wider group, or just a framework for ad hoc coordination. — Dominic Dudley, semafor.com, 4 Aug. 2026

Employees using Microsoft 365 are interrupted every two minutes, on average, by a meeting, email or notification, and 60% of meetings are ad hoc rather than scheduled. — Marie Holive, Forbes.com, 4 Aug. 2026

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