Pronunciation: (dis-man'tl),[key] —v.t.,-tled, -tling. 1. to deprive or strip of apparatus, furniture, equipment, defenses, etc.: to dismantle a ship; to dismantle a fortress. 2. to disassemble or pull down; take apart: They dismantled the machine and shipped it in pieces. 3. to divest of dress, covering, etc.: The wind dismantled the trees of their leaves.