unheard-of

unheard–of

adjective

Definition of UNHEARD-OF

not known or experienced before <houses selling at unheard-of prices>

Synonyms fresh, novel, original, strange, unaccustomed, unfamiliar, unheard-of, unknown, unprecedented

Related Words innovative, unique; nontraditional, unconventional, untried, unused, unworn; pathbreaking, pioneering, trailblazing

Near Antonyms conventional, established, traditional, tried, tried-and-true; derivative, imitative

Antonyms familiar, hackneyed, old, time-honored, tired, warmed-over