Lewis Short
(adjective) : prōmus, a, um, promo.
* In economic lang., of or belonging to giving out, distributing. cella, a store-room, larder, Tert. Res. Carn. 27.
* Subst.: prō-mum, i, a store-room, Tert. ad Uxor. 2, 4 fin.—Much more freq.
* Subst.: prō-mus, i, m., a giver out, distributor of provisions (opp. condus, the keeper of them); and hence, in gen.,a cellarer, steward, butler,Plaut. Poen. 3, 4, 6; id. Ps. 2, 2, 14: foris est promus,Hor. S. 2, 2, 16; Varr. R. R. 1, 16, 5; Col. 12, 3, 9; Aus. Ep. 22, 20.
* Transf.: librorum,he who gives out books from a library, a librarian,App. Mag. p. 308, 17: ego meo sum promus pectori, I keep the key of my own breast, i. e. I guard my heart against evil, Plaut. Trin. 1, 2, 44.
Charlton T. Lewis, Charles Short, A Latin Dictionary