Definition of dissipating:
(v) :
(intransitive) To vanish by dispersion.
(v) :
(transitive) To drive away, disperse.
(v) :
(transitive) To use up or waste; squander.
(v) :
(physics) To cause energy to be lost through its conversion to heat.
(v) :
(intransitive, colloquial, dated) To be dissolute in conduct.
(adj) :
dissipated