firm n[German Firma , from Italian, signature, ultimately from Latin firmare to make firm, confirm]
1 : the name or title under which a company transacts business
2 : a partnership of two or more persons that is not recognized as a legal person distinct from the members composing it
3 : a business unit or enterprise
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.