What does sŭperventus mean in Latin?

sŭperventus, a noun, means “a coming up”.

noun

sŭperventus

sŭperventus, ūs, m. id.,

I. a coming up or upon, an arrival (post-Aug.).

I. In gen., Plin. 7, 15, 13, § 64; Tac. H. 2, 54.—

II. In partic., in milit. lang., an attack, Veg. Mil. 3, 8; 3, 22.

What does sŭperventus mean in Latin?: sŭperventus, a noun, means “a coming up”.