prōmissīvus, a, um, adj. [promitto], promising, promissive; in gram.; promissivum tempus, i. e. the future tense, Cons. p. 2061 P.: modus, Diom. p. 328 P.: sententiae, Isid. 2, 21, 18.
Adv.: prōmissīvē, by way of promise, with a promise (postclass.), Tert. adv. Marc. 4, 10.