An implied contract is a legally binding agreement that is not explicitly stated. Some common synonyms for the term implied contract include tacit agreement, inferred contract, implicit understanding, and unspoken contract. These terms are often used interchangeably to describe contracts that are formed implicitly through the actions, behavior, or circumstances of the parties involved. Other related terms include the concept of a "course of dealing," which refers to a pattern of behavior between parties that creates an implied contract over time, and the principle of "estoppel," which prevents a party from denying the existence of an implied contract if they have acted in a way that suggests its existence.