Definitions
1.NounA wood-based material resembling heavy paper, used in the manufacture of boxes, cartons and signs.
2.NounSomething flat or insubstantial.
3.NounSynonym of African nutmeg (“Pycnanthus angolensis”).
4.Noun↑ Walter Soroka, Illustrated Glossary of Packaging Terminology, p. 154
5.AdjectiveMade of or resembling cardboard; flat or flavorless.