praeter-lābor, lapsus, 3, v. dep. n. and a.
I Lit., to glide or flow by , to fly or run past : praeterlabentia flumina, Quint. 10, 3, 24.—With acc.: tumulum, Verg. A. 6, 874: hanc (tellurem) pelago praeterlabare necesse est, to sail past , id. ib. 3, 478.—
II Trop., to slip away : (definitio) ante praeterlabitur, quam percepta est, Cic. de Or. 2, 25, 109.