Source : Webster's Revised Unabridged Dictionary (1913)

Ne Temere \Ne Te"me*re\ [So named from L. ne not + temere
   rashly, the first two words in the decree.] (R. C. Ch.)
   A decree of the Congregation of the Council declaring invalid
   [so far as the laws of the Roman Catholic Church are
   concerned] any marriage of a Roman Catholic, or of a person
   who has ever been a Roman Catholic, if not contracted before
   a duty qualified priest (or the bishop of the diocese) and at
   least two witnesses. The decree was issued Aug. 2, 1907, and
   took effect on Easter Apr. 19, 1908. The decree by its terms
   does not affect mixed marriages (those between Roman
   Catholics and persons of another faith) in Germany.