Source : Webster's Revised Unabridged Dictionary (1913)

Consumption \Con*sump"tion\ (?; 215), n. [L. consumptio: cf. F.
   consomption.]
   1. The act or process of consuming by use, waste, etc.;
      decay; destruction.

            Every new advance of the price to the consumer is a
            new incentive to him to retrench the quality of his
            consumption.                          --Burke.

   2. The state or process of being consumed, wasted, or
      diminished; waste; diminution; loss; decay.

   3. (Med.) A progressive wasting away of the body; esp., that
      form of wasting, attendant upon pulmonary phthisis and
      associated with cough, spitting of blood, hectic fever,
      etc.; pulmonary phthisis; -- called also {pulmonary
      consumption}.

Source : WordNet®

consumption
     n 1: the process of taking food into the body through the mouth
          (as by eating) [syn: {ingestion}, {intake}, {uptake}]
     2: involving the lungs with progressive wasting of the body
        [syn: {pulmonary tuberculosis}, {phthisis}, {wasting
        disease}, {white plague}]
     3: (economics) the utilization of economic goods to satisfy
        needs or in manufacturing; "the consumption of energy has
        increased steadily" [syn: {economic consumption}, {usance},
         {use}, {use of goods and services}]
     4: the act of consuming something [syn: {using up}, {expenditure}]