material like very thick, stiff paper, usually pale brown in colour, used especially for making boxes: 硬纸板
a cardboard box

adjective

  1. made from cardboard
    硬纸板制的:
    a cardboard box
    硬纸板盒
  2. [only before noun] seeming silly and not real
    显得愚蠢的; 不真实的:
    a romantic novel full of cardboard characters
    充满虚构人物的爱情小说