未曾有 (1) Never. Not yet. Not yet been, seen, experienced; unprecedented; there has never been...; rare; unusual. (2) In Indian drama and aesthetic writings there was a style of poetry called adbhuta. This word means 'surprised', or 'well I never....' Since the Buddhist scriptures were something not yet seen in the world, this word came to be used to term one kind of the twelve divisions of the Buddhist canon, the adbhuta 阿浮達磨, which are accounts of miracles performed by the Buddha or another deity. Also translated as 希法, 勝法, 奇特法, 未曾有法, and 未曾有經, and transcribed as 阿浮陀達磨, 阿浮多達磨, 頞浮陀達磨, and 阿浮達磨.

梵語 adbhuta-dharma，巴利語 abbhuta-dhamma。譯為希法、勝法、奇特法、未曾有法、未曾有經。音譯為阿浮陀達磨、阿浮多達磨、頞浮陀達磨、阿浮達磨。乃原始佛教經典基本型態之一。佛陀入滅以後，弟子們取佛陀之言行，依其性質，類集為九部經或十二部經；「未曾有」即為九部經之一，亦為十二部經之一。乃在經典中記錄有關佛之神祕不可思議，種種向所未有之奇特境界，或讚歎佛之偉大功德者。例如佛陀誕生時，其身放大光明，燭照三千大千世界及幽闇之處，復照十方無量諸佛之三千大千世界。其時於佛母前有清淨之池，以浴太子。又有梵王執蓋、帝釋洗身、二龍吐水等無量希有之事，凡此種種，皆稱為未曾有經。另據成實論卷一載，舉凡劫盡之大變異事、諸天之身量、大地之震動等不可思議之事，皆為「未曾有經」所記載者，並不限指佛之不可思議事。又瑜伽師地論卷八十一載，宣說「未曾有法」之人，有如來、聲聞弟子、在家居士等三種之別。〔北本大般涅槃經卷十五、大毘婆沙論卷一二六、顯揚聖教論卷六、卷十二、大乘義章卷一〕（參閱「十二部經」344）

佛光電子大辭典

p1936

未曾有===（雜語）梵名阿浮陀Adbhuta，譯言希有，未曾有。總以名意外之事。法華經序品曰：「是諸大眾得未曾有，歡喜合掌。」

丁福保《佛學大辭典》

【梵】adbhutadharmaḥ
【滿】ferguwecuke nomun i aimak
【蒙】tangsug bologson u aiimag
【漢】未曾有

Pentaglot Dictionary of Buddhist Terms