Definition of fire block in US English:

fire block

noun

  • 1A block of fire-resistant material, typically for use in or around a fire. Now rare.

  • 2A piece of wood on which a spindle or drill is used to start a fire by friction.

Origin

Mid 17th century. From fire + block.

Pronunciation

fire block

/ˈfʌɪə ˌblɒk/