promise legal definition

An avowal to do something or to refrain from doing something, conveyed in such a way as to assure another that it will be done, and that can be considered binding.

A promise made without expectation of compensation; one not supported by consideration.

An agreement cloaked in terms that make it appear to be a promise, but not actually committing anything to anybody; for example, “I’ll back you up as long as it’s in my interest to do so.” The person who made that promise is not obligated to do anything.