Lewis Short
(P. a.) : promptus, a, um, Part. and , from promo.
Charlton T. Lewis, Charles Short, A Latin Dictionary
Lewis Short
promptus | promtus (noun M) : (), , promo, prop. a taking forth; hence
* An exposing to view, a being visible, visibility; only in the phrase in promptu (esse, habere, ponere, etc.), public, open, visible, manifest, before the eyes: ut (decorum) non reconditā quādam ratione cernatur, sed sit in promptu,Cic. Off. 1, 27, 95; so (opp. reconditiora) id. Ac. 2, 4, 10; (opp. interiora) id. Div. 2, 60, 124: aliquid ponere in promptu (opp. contegere atque abdere),id. Off. 1, 35, 126: ingenium in promptu habere,to display,Sall. C. 7, 1: iram in promptu gerere,Plaut. Ps. 1, 5, 33: in promptu scrinia Brutus habet,Ov. P. 1, 1, 24: in promptu gerunt ova,Col. 8, 11, 8: in promptu est, with a subject-clause, it is clear, plain, evident: omnibus in promptu manifestumque esse videmus, etc.,Lucr. 2, 149; 246; 868.
* Readiness; only in the phrase in promptu esse, habere, to be at hand, to have ready: ea dicam, quae mihi sunt in promptu,Cic. Ac. 1, 2, 4; Liv. 25, 29 fin.: in promptu habere, quantum natura hominis pecudibus antecedat,Cic. Off. 1, 30, 105.
* Ease, facility; only in the phrase in promptu esse, to be easy, Sall. Or. ad Caes. 2: quadrupedes In promptu regere est,Ov. M. 2, 84: quam quae comprendere dictis In promptu mihi sit,id. ib. 13, 161.
Charlton T. Lewis, Charles Short, A Latin Dictionary