from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The cardinal number equal to 8 × 10.
- n. A decade or the numbers from 80 to 89: They were still active in their eighties. Before noon, the temperature shot into the eighties.
- n. The decade from 80 to 89 in a century.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The cardinal number occurring after seventy-nine and before eighty-one, represented in Roman numerals as LXXX and in Arabic numerals as 80.
from the GNU version of the Collaborative International Dictionary of English
- adj. Eight times ten; fourscore.
- n. The sum of eight times ten; eighty units or objects.
- n. A symbol representing eighty units, or ten eight times repeated, as 80 or lxxx.
from The Century Dictionary and Cyclopedia
- Eight times ten, or one more than seventy-nine; fourscore: a cardinal numeral.
- n. The number greater by one than seventy-nine; the sum of eight tens.
- n. A symbol representing eighty units, as 80, or LXXX, or lxxx.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the cardinal number that is the product of ten and eight
- adj. being ten more than seventy
Middle English eighti, from Old English eahtatig; see oktō(u) in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)