say it: dis-i-PAY-shuhn
dissipation is a noun meaning "breaking up and scattering by dispersion". It carries 3 recorded senses.
dissolute indulgence in sensual pleasure
useless or profitless activity; using or expending or consuming thoughtlessly or carelessly
“if the effort brings no compensating gain it is a waste”
“mindless dissipation of natural resources”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for dissipation come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.