From Longman Dictionary of Contemporary Englishdrawbridgedraw‧bridge /ˈdrɔːbrɪdʒ $ ˈdrɒː-/ noun [countable] 1 TTWa bridge that can be pulled up to stop people from entering a castle, or to let ships pass2 → pull up the drawbridge
Examples from the Corpus
drawbridge• Mackey drove across a drawbridge over the Miami River.• At the cut-off time for the coursework an electronic drawbridge goes up: students are no longer allowed to write to their directories.• Its drawbridge lowering, he would ride across it to a joyous welcome.• He heard the hollow thudding of hooves and the duller sound of feet constantly tramping the timbers of the drawbridge.• The sergeant felt uneasy while he and Blanche stood on the drawbridge.• But at night the Duke locked the door of her room, and pulled up the drawbridge.• The drawbridge was raised, of course, but it was a narrow moat.• People already burdened with anxieties and fears should not have to cross this drawbridge too. 