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 system is governed by ad hoc agreements among collectors. — Donald Keough, Christian Science Monitor, 6 July 2026

The main social space on the ground floor is purposely uncluttered, all the better to shift easily between poolside family frolics, predinner drinks with guests, and ad hoc performances when the muse strikes. — Mayer Rus, Architectural Digest, 1 July 2026

Petrakakos said arrangements around possible tolls or coordination with Iran remain largely ad hoc, with most shipping companies avoiding direct engagement because of sanctions risk. — Hugh Leask, CNBC, 29 June 2026

The tentative deal, known as an Enhanced City Resources Master Agreement, goes before the council’s ad hoc committee on the Olympic Games on Tuesday, then to the full council. — David Zahniser, Los Angeles Times, 27 June 2026

Podcast

Get Word of the Day delivered to your inbox!