Princeton's WordNet

1. unprecedented(adj)

   having no precedent; novel

   "an unprecedented expansion in population and industry"

Kernerman English Learner's Dictionary

1. unprecedented(adjective)ʌnˈprɛs ɪˌdɛn tɪd

   never having happened or been seen before

   An unprecedented number of people went to vote.

Wiktionary

1. unprecedented(Adjective)

   Never before seen or done, without precedent.

Webster Dictionary

1. Unprecedented(adj)

   having no precedent or example; not preceded by a like case; not having the authority of prior example; novel; new; unexampled

• ongehoordAfrikaans
• غَيْر مَسْبوقArabic
• безпрецедентенBulgarian
• inéditoPortuguese (BR)
• bezpříkladnýCzech
• beispiellosGerman
• uden fortilfældeDanish
• πρωτοφανής, χωρίς προηγούμενοGreek
• sin precedenteSpanish
• ennekuulmatuEstonian
• بی سابقهFarsi
• ennenkuulumatonFinnish
• sans précédentFrench
• חֲסַר תַקדִיםHebrew
• बेमिसाल, अपूर्व, अनोखाHindi
• besprimjeran, bez presedanaCroatian
• példa nélkül állóHungarian
• belum pernah terjadiIndonesian
• fordæmislausIcelandic
• senza precedentiItalian
• 前例のないJapanese
• 전례 없는Korean
• neturintis precedentoLithuanian
• bezprecedenta-; nebijis; nepiedzīvotsLatvian
• tdk pernah berlaku dahuluMalay
• ongekendDutch
• uhørt, uten presedens/sidestykkeNorwegian
• bezprecedensowyPolish
• بی سابقهPersian
• بې سارى ، نوىPashto
• sem precedentePortuguese
• fără precedent, nemaiauzitRomanian
• беспрецедентныйRussian
• bezpríkladný, neslýchanýSlovak
• brez primereSlovenian
• bez presedanaSerbian
• aldrig förut skådad, utan motstyckeSwedish
• ที่ไม่เคยเกิดขึ้นมาก่อนThai
• eşi görülmemişTurkish
• 無先例的，空前的Chinese (Trad.)
• безпрецедентнийUkrainian
• ماضي ميں جس کي نظير نہ ہوUrdu
• không có tiền lệVietnamese
• 无先例的，空前的Chinese (Simp.)