The Collaborative International Dictionary of English v.0.48:

Frigid \Frig"id\, a. [L. frigidus, fr. frigere to be cold; prob.
   akin to Gr. ? to shudder, or perh. to ? cold. Cf. Frill.]
   1. Cold; wanting heat or warmth; of low temperature; as, a
      frigid climate.
      [1913 Webster]

   2. Wanting warmth, fervor, ardor, fire, vivacity, etc.;
      unfeeling; forbidding in manner; dull and unanimated;
      stiff and formal; as, a frigid constitution; a frigid
      style; a frigid look or manner; frigid obedience or
      service.
      [1913 Webster]

   3. Wanting natural heat or vigor sufficient to excite the
      generative power; impotent. --Johnson.
      [1913 Webster]

   Frigid zone, that part of the earth which lies between
      either polar circle and its pole. It extends 23? 28? from
      the pole. See the Note under Arctic.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Frigid Zone
    n 1: the part of the Earth's surface forming a cap over a pole;
         characterized by frigid climate [syn: Frigid Zone, polar
         zone, polar region]