from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. As much as a tumbler will hold.
from the GNU version of the Collaborative International Dictionary of English
- n. As much as a tumbler will hold; enough to fill a tumbler.
from The Century Dictionary and Cyclopedia
- n. The quantity of liquid which fills or nearly fills a tumbler: as, to drink a tumblerful of water.
tumbler + -ful (Wiktionary)