Theft involves taking movable property without consent and moving it to take possession. Criminal misappropriation involves converting or misusing movable property dishonestly for one's own use. Theft violates the right of possession, while criminal misappropriation does not since the offender already possessed the property. The key differences are that theft always involves unlawful taking and violating possession, while criminal misappropriation can involve lawful initial possession where the dishonest intention develops later. Theft is defined and punished under section 378/379 of the Indian Penal Code, while criminal misappropriation is defined and punished under section 403.