promise-n; 2 Senses

Sense Number 1: a declaration that is a binding commitment, an oath

Commentary: PROMISE[+event][+speech_act][+declaration][+commitment][+binding]
NOTE: implies a person/agent verbally placing themselves under an obligation to do something.

He has broken his promise to the American people not to raise taxes.
She left the meeting early with a promise to send us the drawings tomorrow.
Their promises of support never materialized.

PropBank: promise.01
WordNet 3.0 Sense Numbers: 1

Sense Number 2: an indication of a future desirable outcome

Commentary: PROMISE[+entity][+symbolic][+information][+evidence][+outcome][+future][+desirable]

After a two-month drought, the skies finally held the promise of rain.
He shows great promise as a theoretical physicist.
After this event there is little promise of a peace accord.

PropBank: NM
WordNet 3.0 Sense Numbers: 2