Adar /ɑˈdɑr, ˈɑ-/
  A·dar n.  The twelfth month of the Hebrew ecclesiastical year, and the sixth of the civil. It corresponded nearly with March.
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  Adar
       n : the sixth month of the civil year; the twelfth month of the
           ecclesiastic year in the Jewish calendar (in February and
           March)
  Adar
     large, the sixth month of the civil and the twelfth of the
     ecclesiastical year of the Jews (Esther 3:7, 13; 8:12; 9:1, 15,
     17, 19, 21). It included the days extending from the new moon of
     our March to the new moon of April. The name was first used
     after the Captivity. When the season was backward, and the lambs
     not yet of a paschal size, or the barley not forward enough for
     abib, then a month called Veadar, i.e., a second Adar, was
     intercalated.