dismantling (Noun) — The act of taking something apart (as a piece of machinery). ex. "Russia and the United States discussed the dismantling of their nuclear weapons"
dismantling (Verb) — Tear down so as to make flat with the ground. ex. "When a force occupies an enemy fortress, it may dismantle the fortifications"
dismantling (Verb) — Take apart into its constituent pieces.
dismantling (Verb) — Take off or remove.