noun

• The act of dissipating or dispersing; a state of dispersion or separation; dispersion; waste.
• A dissolute course of life, in which health, money, etc., are squandered in pursuit of pleasure; profuseness in immoral indulgence, as late hours, riotous living, etc.; dissoluteness.
• A trifle which wastes time or distracts attention.
• (physics) A loss of energy, usually as heat, from a dynamic system.