con ‧ duit /ˈkɒndjuət, ˈkɒndjuɪt, -dɪt $ ˈkɑːnduət/ BrE AmE noun [countable]
[ Date: 1300-1400 ; Language: Old French ; Origin: Latin conductus ; ⇨ ↑ conduct 1 ]
1 . technical a pipe or passage through which water, gas, a set of electric wires etc passes
2 . formal a connection between two things that allows people to pass ideas, news, money, weapons, drugs etc from one place to another
conduit for
Drug traffickers have used the country as a conduit for shipments to the U.S.