(a.) In general, a declaration, written or verbal, made by one person to another, which binds the person who makes it to do, or to forbear to do, a specified act; a declaration which gives to the person to whom it is made a right to expect or to claim the performance or forbearance of a specified act.
PROMISE
Meaning of PROMISE in English
Webster's English dictionary. Английский словарь Webster. 2012