What is Accommodation?

Legal Definition
Accommodation is a legal obligation entered into as a gratuitous favor without consideration, such as a signature guaranteeing payment of a debt. This is sometimes called an accommodation endorsement.
-- Wikipedia
Legal Definition
Contracts. An amicable agreement or composition between two contending parties. It differs from accord and satisfaction, which may take place without any difference having existed between the parties.
-- Bouviers Law Dictionary
Legal Definition
An arrangement or engagement made as a favor to another, not upon a consideration received; Homething done to oblige, usually spoken of a loan of money or commercial paper; also a friendly agreement or composition of differences. Abbott.
-- Black's Law Dictionary
Legal Definition
An obligation assumed gratis.
-- Ballentine's Law Dictionary