Webster's Revised Unabridged Dictionary (1913 + 1828)
result(s) from the 1913
Dis"si*pate (?), v. t. [imp. & p. p. Dissipated; p. pr. & vb. n. Dissipating.] [L. dissipatus, p. p. of dissipare; dis- + an obsolete verb sipare, supare. to throw.]
1. To scatter completely; to disperse and cause to disappear; -- used esp. of the dispersion of things that can never again be collected or restored.
Dissipated those foggy mists of error.
I soon dissipated his fears.
The extreme tendency of civilization is to dissipate all intellectual energy.
2. To destroy by wasteful extravagance or lavish use; to squander.
The vast wealth . . . was in three years dissipated.
Syn. -- To disperse; scatter; dispel; spend; squander; waste; consume; lavish.
Dis"si*pate, v. i.
1. To separate into parts and disappear; to waste away; to scatter; to disperse; to vanish; as, a fog or cloud gradually dissipates before the rays or heat of the sun; the heat of a body dissipates.
2. To be extravagant, wasteful, or dissolute in the pursuit of pleasure; to engage in dissipation.