dis ‧ si ‧ pa ‧ tion /ˌdɪsəˈpeɪʃ ə n, ˌdɪsɪˈpeɪʃ ə n/ BrE AmE noun [uncountable] formal
1 . the process of making something gradually weaker or less until it disappears:
the dissipation of heat
2 . the enjoyment of physical pleasures in a way that is harmful:
a life of dissipation
3 . the act of wasting money, time, energy etc:
the dissipation of resources