Synonyms of unprecedented

unprecedented

adjective

ˌən-ˈpre-sə-ˌden-təd 

as in novel

not known or experienced before

this is an unprecedented request for the reference desk

Synonyms & Similar Words

• novel
• new
• strange
• unfamiliar
• fresh
• unheard-of
• original
• unknown
• unique
• unaccustomed
• innovative
• unconventional
• pioneering
• nontraditional
• untried
• unused
• trailblazing
• pathbreaking
• unworn

Antonyms & Near Antonyms

• familiar
• old
• hackneyed
• traditional
• tired
• conventional
• established
• time-honored
• tried
• derivative
• warmed-over
• imitative
• tried-and-true

Example Sentences

Recent Examples of unprecedented

Yorktown Public Library without flood insurance Yorktown Public Library faces an unprecedented challenge to rebuild, and will have to do so without insurance. — John Tufts, IndyStar, 19 Aug. 2026

Players Era, a subsidiary of RedBird IMI’s EverWonder Studio, launched in 2024 with an unprecedented offer of $1 million in NIL money to participating programs, dramatically altering the economics and expectations of early-season college basketball. — Daniel Libit, Sportico.com, 19 Aug. 2026

Moriarty and Ellison repeatedly stressed that extradition requests are intended to be administrative, and an apparent refusal like Abbott's is extremely rare, if not unprecedented. — Anthony Bettin, CBS News, 18 Aug. 2026

Spurred by tech giants’ insatiable appetite for computing power to dominate frontier models, the unprecedented global expansion of AI infrastructure has created demand so enormous that no single country can satisfy it. — John Liu, CNN Money, 18 Aug. 2026