incursĭo, ōnis, f. [incurro], a running against, onset, assault, attack (class.).
I In gen.: atomorum, Cic. N. D. 1, 41, 114: atque impetus armatorum, id. Caecin. 15, 44; Quint. 6, 4, 14 Spald. N. cr. —
II In partic., a hostile inroad , incursion : hostiliter in fines Romanos incursionem facit, Liv. 1, 11, 1: prohibere hostem ab incursionibus, Caes. B. G. 6, 10 fin. : subitas hostium incursiones sustinere, Hirt. B. G. 8, 11 fin. : moliri incursionem, Plin. 6, 28, 32, § 146.