What is Dishonesty?

Legal Definition
Dishonesty is to act without honesty. It is used to describe a lack of probity, cheating, lying or being deliberately deceptive or a lack in integrity, knavishness, perfidiosity, corruption or treacherousness. Dishonesty is the fundamental component of a majority of offences relating to the acquisition, conversion and disposal of property (tangible or intangible) defined in criminal law such as fraud.
-- Wikipedia