1. to take a machine or structure apart
dismantle a car/engine/machine
The verb 'to dismantle' means to take something apart. You can dismantle machinery or structures in order to repair them or to reuse parts. This is a formal way of saying 'take apart', 'to breakdown' or 'pull apart'. The prefix 'dis' means 'apart' 'asunder' and 'away' however, although the prefix 'dis' is used 'mantle' refers to a cloak or a layer of the earth and does not mean 'to put together'. This verb is more often used in formal or professional contexts.