D defs.my
Entry 1 sense Webster, 1913

Unprecedented

/ən-prĕs'-ĭd-ĕnˌ-tĭd/ · Un·prec·e·dent·ed · IPA /ʌnˈpɹiːsədɛntəd/
01 a. Having no precedent or example; not preceded by a like case; not having the authority of prior example; novel; new; unexampled.
  1. 1.
    Having no precedent or example; not preceded by a like case; not having the authority of prior example; novel; new; unexampled.