| Unprecedented (a.) Having no precedent or example; not preceded by a like case; not having the authority of prior example; novel; new; unexampled. Thesaurus Entries beguiling, bewildering, enigmatic, exceptional, extraordinary, fabulous, fantastic, fascinating, incomprehensible, inconceivable, incredible, indescribable, ineffable, legendary, marvelous, miraculous, mythical, noteworthy, outlandish, passing strange, phenomenal, portentous, primary, prodigious, prototypal, puzzling, rare, remarkable, sensational, strange, striking, stupefying, stupendous, uncopied, unduplicated, unexampled, unheard-of, unimaginable, unimitated, unique, unparalleled, unreproduced, unspeakable, wonderful, wondrous |