资料来源 : Webster's Revised Unabridged Dictionary (1913)

Adar \A"dar\, n. [Heb. ad["a]r.]
   The twelfth month of the Hebrew ecclesiastical year, and the
   sixth of the civil. It corresponded nearly with March.

资料来源 : WordNet®

Adar
     n : the sixth month of the civil year; the twelfth month of the
         ecclesiastic year in the Jewish calendar (in February and
         March)