1. To be obliged; to be necessitated; — expressing either physical or moral necessity; as, a man must eat for nourishment; we must submit to the laws.
2. To be morally required; to be necessary or essential to a certain quality, character, end, or result; as, he must reconsider the matter; he must have been insane. Likewise must the deacons be grave. 1 Tim. iii. 8. Morover, he Note: The principal verb, if easy supplied by the mind, was formerly often omitted when must was used; as, I must away. "I must to Coventry." Shak. MUST Must, n. Etym: [AS. must, fr. L. mustum (sc. vinum), from mustus young, new, fresh. Cf. Mustard.] 1. The expressed juice of the grape, or other fruit, before fermentation. "These men ben full of must." Wyclif (Acts ii. 13. ). No fermenting must fills … the deep vats. Longfellow. 2. Etym: [Cf. Musty.] Defn: Mustiness. MUST Defn: To make musty; to become musty. MUSTAC
Must, v. t. & i.
Mus"tac, n. Etym: [F. moustac.] (Zoöl.)