Cardboard is a generic term for heavy-duty paper-based products having greater thickness and superior durability or other specific mechanical attributes to paper; such as foldability, rigidity and impact resistance. The construction can range from a thick sheet known as paperboard to corrugated fiberboard which is made of multiple corrugated and flat layers.

Despite widespread general use in English and French,[1][2] the term cardboard is deprecated in commerce and industry as not adequately defining a specific product.[3] Material producers, container manufacturers,[4] packaging engineers,[5] and standards organizations,[6] use more specific terminology.