What is a promise?
NOUN an undertaking to do or keep from doing something; expectation,
or that which raises expectation; a ground for hope of future
excellence; fulfilment of what is promised (rare).
VERB TRANSITIVE: to undertake by
promise to do, give, etc; to betroth; to encourage to expect; to
give reason to expect; to assure; to undertake to bestow.
VERB INTRANSITIVE: to make a
promise or promises; to give rise to or reason for hopes or
expectations.