Definition of fire-stop:
(n) :
(uncountable) A (usually self-sustaining) chemical reaction involving the bonding of oxygen with carbon or other fuel, with the production of heat and the presence of flame or smouldering.
(n) :
(countable) An instance of this chemical reaction, especially when intentionally created and maintained in a specific location to a useful end (such as a campfire or a hearth fire).
(n) :
(countable) The occurrence, often accidental, of fire in a certain place, causing damage and danger.
(n) :
(uncountable, alchemy, philosophy) The aforementioned chemical reaction of burning, considered one of the Classical elements or basic elements of alchemy.
(n) :
(countable, British) A heater or stove used in place of a real fire (such as an electric fire).
(n) :
(countable) The elements necessary to start a fire.