- a type of inexpensive writing paper, especially legal-size, lined, yellow sheets, bound in tablet form.
- a size of drawing or printing paper, 13.5 × 17 inches (34 × 43 centimeters). Abbreviations: cap., fcp.
- a size of book, about 4.25 × 6.75 inches (11 × 17 centimeters), untrimmed.
- a size of book, about 6.75 × 8.5 inches (17 × 22 centimeters) untrimmed.
- fool's cap (def. 1).
- a traditional jester's cap or hood, often multicolored and usually having several drooping peaks from which bells are hung.
- dunce cap.
- a size of writing or printing paper, 13 1/2 by 17 inches or 13 1/4 by 16 1/2 inches
- a book size, 4 1/4 by 6 3/4 inches (foolscap octavo) or (chiefly Brit) 6 3/4 by 8 1/2 inches (foolscap quarto)
- a variant spelling of fool's cap
- a hood or cap with bells or tassels, worn by court jesters
- a dunce's cap
