D defs.my
Entry 3 senses Webster, 1913

Dissipation

/(dĭs`sĭ*pā"shŭn)/ · Dis·si·pa·tion · IPA /ˌdɪsɪˈpeɪʃən/
01 n. The act of dissipating or dispersing; a state of dispersion or separation; dispersion; waste.
  1. 1.
    The act of dissipating or dispersing; a state of dispersion or separation; dispersion; waste.
    “Without loss or dissipation of the matter.” Bacon.
    “The famous dissipation of mankind.” Sir M. Hale.
  2. 2.
    A dissolute course of life, in which health, money, etc., are squandered in pursuit of pleasure; profuseness in vicious indulgence, as late hours, riotous living, etc.; dissoluteness.
    “To reclaim the spendthrift from his dissipation and extravagance.” — P. Henry.
  3. 3.
    A trifle which wastes time or distracts attention.
    “Prevented from finishing them [the letters] a thousand avocations and dissipations.” Swift.
Phrases & compounds
Dissipation of energy — Same as Degradation of energy, under Degradation.