for·ti·fi·ca·tionBrE/ˌfɔːtɪfɪˈkeɪʃn/NAmE/ˌfɔːrtɪfɪˈkeɪʃn/noun[C, usually pl.]atower, wall, gunposition, etc. builttodefendaplaceagainstattack碉堡；围墙；炮台；防御工事◆therampartsandfortificationsoftheOldTown旧城区的城墙和城堡[U]theactoffortifyingormakingsthstronger筑城；设防；加强◆plansforthefortificationofthecity城市设防计划