Source : Webster's Revised Unabridged Dictionary (1913)

Cool \Cool\, v. t. [imp. & p. p. {Cooled}; p. pr. & vb. n.
   {Cooling}.]
   1. To make cool or cold; to reduce the temperature of; as,
      ice cools water.

            Send Lazarus, that he may dip the tip of his finger
            in water, and cool my tongue.         --Luke xvi.
                                                  24.

   2. To moderate the heat or excitement of; to allay, as
      passion of any kind; to calm; to moderate.

            We have reason to cool our raging motions, our
            carnal stings, our unbitted lusts.    --Shak.

   {To cool the heels}, to dance attendance; to wait, as for
      admission to a patron's house. [Colloq.] --Dryden.