Source : Webster's Revised Unabridged Dictionary (1913)

Spend \Spend\, v. i.
   1. To expend money or any other possession; to consume, use,
      waste, or part with, anything; as, he who gets easily
      spends freely.

            He spends as a person who knows that he must come to
            a reckoning.                          --South.

   2. To waste or wear away; to be consumed; to lose force or
      strength; to vanish; as, energy spends in the using of it.

            The sound spendeth and is dissipated in the open
            air.                                  --Bacon.

   3. To be diffused; to spread.

            The vines that they use for wine are so often cut,
            that their sap spendeth into the grapes. --Bacon.

   4. (Mining) To break ground; to continue working.

Spend \Spend\, v. t. [imp. & p. p. {Spent}; p. pr. & vb. n.
   {Spending}.] [AS. spendan (in comp.), fr. L. expendere or
   dispendere to weigh out, to expend, dispense. See {Pendant},
   and cf. {Dispend}, {Expend}, {Spence}, {Spencer}.]
   1. To weigh or lay out; to dispose of; to part with; as, to
      spend money for clothing.

            Spend thou that in the town.          --Shak.

            Wherefore do ye spend money for that which is not
            bread?                                --Isa. lv. 2.

Source : WordNet®

spend
     v 1: pass (time) in a specific way; "How are you spending your
          summer vacation?" [syn: {pass}]
     2: pay out; "spend money" [syn: {expend}, {drop}]
     3: spend completely; "I spend my pocket money in two days"
     [also: {spent}]