The Collaborative International Dictionary of English v.0.48:

Warm \Warm\, a. [Compar. Warmer; superl. Warmest.] [AS.
   wearm; akin to OS., OFries., D., & G. warm, Icel. varmr, Sw.
   & Dan. varm, Goth. warmjan to warm; probably akin to Lith.
   virti to cook, boil; or perhaps to Skr. gharma heat, OL.
   formus warm. ???, ???.]
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   1. Having heat in a moderate degree; not cold as, warm milk.
      "Whose blood is warm within." --Shak.
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            Warm and still is the summer night.   --Longfellow.
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   2. Having a sensation of heat, esp. of gentle heat; glowing.
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   3. Subject to heat; having prevalence of heat, or little or
      no cold weather; as, the warm climate of Egypt.
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   4. Fig.: Not cool, indifferent, lukewarm, or the like, in
      spirit or temper; zealous; ardent; fervent; excited;
      sprightly; irritable; excitable.
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            Mirth, and youth, and warm desire!    --Milton.
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            Each warm wish springs mutual from the heart.
                                                  --Pope.
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            They say he's warm man and does not care to be mad?
            mouths at.                            --Addison.
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            I had been none of the warmest of partisans.
                                                  --Hawthor??.
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   5. Violent; vehement; furious; excited; passionate; as, a
      warm contest; a warm debate.
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            Welcome, daylight; we shall have warm work on't.
                                                  --Dryden.
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   6. Being well off as to property, or in good circumstances;
      forehanded; rich. [Colloq.]
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            Warm householders, every one of them. --W. Irving.
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            You shall have a draft upon him, payable at sight:
            and let me tell you he as warm a man as any within
            five miles round him.                 --Goldsmith.
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   7. In children's games, being near the object sought for;
      hence, being close to the discovery of some person, thing,
      or fact concealed. [Colloq.]
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            Here, indeed, young Mr. Dowse was getting "warm," ??
            children say at blindman's buff.      --Black.
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   8. (Paint.) Having yellow or red for a basis, or in their
      composition; -- said of colors, and opposed to cold which
      is of blue and its compounds.
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   Syn: Ardent; zealous; fervent; glowing; enthusiastic;
        cordial; keen; violent; furious; hot.
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The Collaborative International Dictionary of English v.0.48:

Warmer \Warm"er\, n.
   One who, or that which, warms.
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WordNet (r) 3.0 (2006):

warmer
    n 1: device that heats water or supplies warmth to a room [syn:
         heater, warmer]