(1):

(n.) Illegal or prohibited traffic.

(2):

(n.) Goods or merchandise the importation or exportation of which is forbidden.

(3):

(n.) A negro slave, during the Civil War, escaped to, or was brought within, the Union lines. Such slave was considered contraband of war.

(4):

(a.) Prohibited or excluded by law or treaty; forbidden; as, contraband goods, or trade.

(5):

(v. t.) To import illegally, as prohibited goods; to smuggle.

(6):

(v. t.) To declare prohibited; to forbid.