assumpsit n[Medieval Latin, he/she undertook]
: an express or implied promise or contract or quasi contract the breach of which may be grounds for a suit
: a common-law action that may be brought for such a breach compare covenant , debt NOTE: The action of assumpsit developed in early English law and is still available in the U.S. in some jurisdictions.
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.