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

The provision, known as Section 815, would amount to an unprecedented incursion from the government into tens of thousands of companies that do business with the Pentagon, the groups wrote. — Garrett Downs, CNBC, 14 July 2026

Thanks to the unprecedented vision of Hubble and the JWST, Whitaker and his colleagues were able to track the motion of this star around the black hole. — Keith Cooper, Space.com, 14 July 2026

John Campbell scores an unprecedented sixth victory in the $1 million Meadowlands Pace as Real Desire beats favored Bettor’s Delight in the stretch. — Assistant Sports Editor, Los Angeles Times, 14 July 2026

What’s next for Cuba The Cuban economy, heavily reliant on tourism, faces unprecedented pressures. — Juan Carlos Albarran, The Conversation, 13 July 2026