The Collaborative International Dictionary of English v.0.48:

Climate \Cli"mate\, n. [F. climat, L. clima, -atis, fr. Gr. ?,
   ?, slope, the supposed slope of the earth (from the equator
   toward the pole), hence a region or zone of the earth, fr. ?
   to slope, incline, akin to E. lean, v. i. See Lean, v. i.,
   and cf. Clime.]
   1. (Anc. Geog.) One of thirty regions or zones, parallel to
      the equator, into which the surface of the earth from the
      equator to the pole was divided, according to the
      successive increase of the length of the midsummer day.
      [1913 Webster]

   2. The condition of a place in relation to various phenomena
      of the atmosphere, as temperature, moisture, etc.,
      especially as they affect animal or vegetable life.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Climate \Cli"mate\, v. i.
   To dwell. [Poetic] --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

climate
    n 1: the weather in some location averaged over some long period
         of time; "the dank climate of southern Wales"; "plants from
         a cold clime travel best in winter" [syn: climate,
         clime]
    2: the prevailing psychological state; "the climate of opinion";
       "the national mood had changed radically since the last
       election" [syn: climate, mood]

Moby Thesaurus II by Grady Ward, 1.0:

67 Moby Thesaurus words for "climate":
   Antarctic Zone, Arctic Circle, Arctic Zone, Frigid Zones,
   Torrid Zone, Tropic of Cancer, Tropic of Capricorn, Variable Zones,
   Weltanschauung, air, ambiance, ambience, ambient, atmosphere, aura,
   calm weather, climate of opinion, clime, cold weather, equator,
   ethos, fair weather, feel, feeling, forces of nature, good weather,
   halcyon days, horse latitudes, hot weather, ideology,
   intellectual climate, latitude, longitude, longitude in arc,
   macroclimate, medium, meridian, microclimate, milieu,
   mise-en-scene, mood, moral climate, mores, norms, note, overtone,
   parallel, prime meridian, quality, rainy weather, roaring forties,
   sense, spirit, spiritual climate, stormy weather, subtropics,
   surroundings, the elements, the line, tone, tropic, tropics,
   undertone, weather, windiness, world view, zone