Dec 5, 2016 · The meaning of EIGHTY is a number that is equal to eight times 10. How to use eighty in a sentence.

80 is: The sum of Euler's totient function φ (x) over the first sixteen integers: 1 + 1 + 2 + 2 + 4 + 2 + 6 + 4 + 6 + 4 + 10 + 4 + 12 + 6 + 8 + 8 = 80. A semiperfect number, since adding up some subsets of its …

1. the period of time between one's eightieth and ninetieth birthdays.

It's not unusual for a junior doctor to work a seventy or sometimes an eighty hour week. We had eighty applicants for the job, but we've whittled them down to six.

Eighty definition: The cardinal number equal to 8 × 10.

Dec 5, 2025 · Numeral eighty The cardinal number occurring after seventy-nine and before eighty-one, represented in Roman numerals as LXXX and in Arabic numerals as 80. Synonym: fourscore (archaic)

Apr 25, 2025 · From its mathematical properties to its cultural and symbolic representations, eighty is a number that has fascinated people for centuries. In this article, we will delve into the world of eighty, …

Eighty is the number 80. Eighty horses trotted up. When you talk about the eighties, you are referring to numbers between 80 and 89. For example, if you are in your eighties, you are aged between 80 and …

EIGHTY definition: a cardinal number, ten times eight. See examples of eighty used in a sentence.

Definition of eighty in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.