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

Using Ad Hoc Communication Processes Informal communication through hallway conversations, personal relationships and ad hoc decisions can break down quickly as a company grows. — Expert Panel®, Forbes.com, 15 Oct. 2026

The first part, the Way, was an ad hoc system of safety rules and climbing ethics, handed down from climber to climber. — Daniel Duane, New York Times, 14 Oct. 2026

Bryan spends long swaths of time there, writing from a 1970s Pierre Chapo chair that has the ad hoc look of a backyard woodworking project. — Hannah Martin, Architectural Digest, 12 Oct. 2026

Gowanus is hardly the only postindustrial New York neighborhood rife with toxic waste — in Williamsburg and Greenpoint, the extent of toxic contamination is still being uncovered and mitigated in an ad hoc fashion. — Kim Velsey, Curbed, 9 Oct. 2026

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