1. The retention of a benefit conferred by another, without offering compensation, in circumstances where compensation is reasonably expected. [Cases: Implied and Constructive Contracts
3. C.J.S. Implied and Constructive Contracts § 5.]
2. A benefit obtained from another, not intended as a gift and not legally justifiable, for which the beneficiary must make restitution or recompense.
3. The area of law dealing with unjustifiable benefits of this kind.