ˈpräməˌsōrē, -sȯr-, -ri adjective
Etymology: Medieval Latin promissorius, from Latin promissus (past participle of promittere to promise) + -orius -ory — more at promise
1. : containing or conveying a promise or assurance that something will be done or forborne or will probably be or happen
promissory oath
promissory speech
2. : stipulating or representing what is to happen or to be done subsequent to the time of making the contract of insurance — used of a representation, a warranty; compare affirmative