the GNU version of the Collaborative International Dictionary of English
n. As much as a cup will hold.
The Century Dictionary and Cyclopedia
n. The quantity that a cup holds; the contents of a cup.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the quantity a cup will hold
Word Usage
"Soak a cupful of bread-crumbs in milk, squeeze dry, add two tablespoonfuls of butter, the yolk of an egg, and pepper, salt, thyme, and lemon-juice to season."