prōmissĭo, ōnis f. [promitto].
I In gen., a promising , promise (class. only in sing.; prop. the act of promising; cf. promissum, the thing promised ): provinciae, Cic. Att. 8, 9, 4: auxilii, id. Fam. 4, 13, 1: scelerum, id. Phil. 8, 3, 10; cf. Don. Ter. And. 401.—
II In partic., rhet. t. t., a promising : tum promissio, si audierint, probaturos, Cic. de Or. 2, 83, 339; 3, 53, 205.