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. [ 1913 Webster ]

2. To be extravagant, wasteful, or dissolute in the pursuit of pleasure; to engage in dissipation. [ 1913 Webster ]

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. [ 1913 Webster ]

Dissipated those foggy mists of error. Selden. [ 1913 Webster ]

I soon dissipated his fears. Cook. [ 1913 Webster ]

The extreme tendency of civilization is to dissipate all intellectual energy. Hazlitt. [ 1913 Webster ]

2. To destroy by wasteful extravagance or lavish use; to squander. [ 1913 Webster ]

The vast wealth . . . was in three years dissipated. Bp. Burnet.

Syn. -- To disperse; scatter; dispel; spend; squander; waste; consume; lavish. [ 1913 Webster ]

a. 1. Squandered; scattered. “Dissipated wealth.” Johnson. [ 1913 Webster ]

2. Wasteful of health, money, etc., in the pursuit of pleasure; dissolute; intemperate. [ 1913 Webster ]

A life irregular and dissipated. Johnson. [ 1913 Webster ]