(Noun) Base or shameful character; baseness, vileness; depravity, wickedness.

In Context

“Although he committed no crimes other than these two of tax evasion, DeGeorge faced deportation under the Immigration Act of 1917, which categorized these convictions as crimes of moral turpitude.”

Linell E. Cady and Tracy Fessenden, Editors, Religion, the Secular, and the Politics of Sexual Difference, 2013.