Definition of Masonite in English:



North American
  • [mass noun] Fibreboard made from wood fibre pulped under steam at high pressure.

    [as modifier] ‘quality Masonite boards’
    • ‘For the past few years, my students have used Masonite panels for the execution of their projects.’
    • ‘Now, each student used their transparency to project onto their prepared Masonite panel.’
    • ‘Working often on Masonite or other board, and occasionally even on cardboard when he lacked funds, he would lay down a warm, dark tone, sometimes simply a coat of shellac, on which to paint.’
    • ‘If the scales are not level with each other, use plywood or some other material, such as aluminum or Masonite, and shim them until all four scales are level.’
    • ‘Since the shelves would have to support a good amount of weight, I cut Masonite rather than foam board to fit tightly into them.’


1920s: from the name of the Mason Fibre Co., Mississippi, US, + -ite.