Source : Webster's Revised Unabridged Dictionary (1913)

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. ???, ???.]
   1. Having heat in a moderate degree; not cold as, warm milk.
      ``Whose blood is warm within.'' --Shak.

            Warm and still is the summer night.   --Longfellow.

   2. Having a sensation of heat, esp. of gentle heat; glowing.

   3. Subject to heat; having prevalence of heat, or little or
      no cold weather; as, the warm climate of Egypt.

   4. Fig.: Not cool, indifferent, lukewarm, or the like, in
      spirit or temper; zealous; ardent; fervent; excited;
      sprightly; irritable; excitable.

            Mirth, and youth, and warm desire!    --Milton.

            Each warm wish springs mutual from the heart.
                                                  --Pope.

            They say he's warm man and does not care to be mad?
            mouths at.                            --Addison.

            I had been none of the warmest of partisans.
                                                  --Hawthor??.

   5. Violent; vehement; furious; excited; passionate; as, a
      warm contest; a warm debate.

            Welcome, daylight; we shall have warm work on't.
                                                  --Dryden.

   6. Being well off as to property, or in good circumstances;
      forehanded; rich. [Colloq.]

            Warm householders, every one of them. --W. Irving.

            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.

   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.]

            Here, indeed, young Mr. Dowse was getting ``warm,''
            ?? children say at blindman's buff.   --Black.

   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.

   Syn: Ardent; zealous; fervent; glowing; enthusiastic;
        cordial; keen; violent; furious; hot.

Warmer \Warm"er\, n.
   One who, or that which, warms.

Source : WordNet®

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