Definition of fireboard in US English:

fireboard

noun

  • 1A board or screen used to cover a fireplace; a chimney board. In early use also: a fireguard.

  • 2A type of board capable of withstanding heat; a fireproof or fire-resistant board.

  • 3A piece of wood on which a fire drill is used to start a fire by friction.

  • 4A ledge or shelf above a fireplace; a mantelpiece.

Origin

Mid 18th century. From fire + board.

Pronunciation

fireboard

/ˈfʌɪəbɔːd/