a type of inexpensive writing paper, esp. legal-size, lined, yellow sheets, bound in tablet form.

Chiefly British . a size of drawing or printing paper, 13 1 / 2 × 17 in. (34 × 43 cm). Abbreviation

cap., fcp.

Also called foolscap octavo. a size of book, about 4 1 / 4 × 6 3 / 4 in. (11 × 17 cm), untrimmed.

Also called foolscap quarto. Chiefly British . a size of book, about 6 3 / 4 × 8 1 / 2 in. (17 × 22 cm) untrimmed.

fool's cap ( def. 1 ) .