I. ˈād.]ē, ˈāt], ]i\ adjective
Etymology: Middle English eightety, eighty, from Old English eahtatig, short for hundeahtatig, from hundeahtatig, n., group of 80, from hund hundred + eahta eight + -tig group of ten; akin to Old High German -zug group of ten, Old Norse tigr, Gothic -tigjus; all derivatives from the root of Old English tīen, tȳn, tēn ten — more at hundred , eight , ten
: being one more than 79 in number
eighty years
— see number table
II. noun, plural in construction
Etymology: Middle English eightety, eighty, from eightety eighty adjective
: 80 countable persons or things not specified but under consideration and being enumerated
eighty are here
eighty were found
III. noun
( -es )
1. : eight tens : twice 40 : five times 16 : four twenties : fourscore
2.
a. : 80 units or objects
a total of eighty
b. : a group or set of 80
3. : the numerable quantity symbolized by the arabic numerals 80
4. : the 80th in a set or series
5. : something having as an essential feature 80 units or members
6. : an 80-acre tract of land
7. eighties plural
a. : the numbers 80 to 89 inclusive
a golf score in the eighties
all his grades in that subject are in the eighties
b. : the members of a series or set of successive numbers that end in 80 to 89 inclusive
the eighties of the preceding century
lives in the eighties in the next block
c. : the portion of a continuum lying between 80 and 90 on a scale of measurement or segmentation
temperatures in the high eighties tomorrow
a man still vigorous in his eighties