To corrupt the morals or principles of; entice into improper conduct, as excessive indulgence, treason, etc.; lead astray, as from morality, duty, or allegiance: as, to debauch a youth by evil instruction and example; to debauch an army.Specifically, to corrupt with lewdness; bring to be guilty of unchastity; deprave; seduce: as, to debauch a woman.To lower or impair in quality; corrupt or vitiate; pervert.Figuratively, to spoil; dismantle; render unserviceable.To riot; revel.n. Excess in eating or drinking; intemperance; drunkenness; gluttony; lewdness.n. An act or a period of debauchery.