bar·ri·cade / ˈbariˌkād/ • n. an improvised barrier erected across a street or other thoroughfare to prevent or delay the movement of opposing forces.• v. [tr.] block or defend with such a barrier: he barricaded the door with a bureau [as adj.] (barricaded) the heavily barricaded streets. ∎ shut (oneself or someone) into a place by blocking all the entrances: detainees who barricaded themselves into their dormitory.