Pronunciation: (pāst'bôrd', -bōrd"),[key] —n. 1. a stiff, firm board made of sheets of paper pasted or layers of paper pulp pressed together.
2. Older Slang.a card, as a visiting card or a playing card.
3. Older Slang.a ticket, as for the theater.
—adj. 1. made of pasteboard.
2. unsubstantial, flimsy, or sham.