(eighties)
Frequency: The word is one of the 700 most common words in English.
1.
Eighty is the number 80.
Eighty horses trotted up.
NUM
2.
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 89. If the temperature is in the eighties, the temperature is between 80 and 89 degrees.
He was in his late eighties and had become the country’s most respected elder statesman.
N-PLURAL
3.
The eighties is the decade between 1980 and 1989.
He ran a property development business in the eighties.
N-PLURAL: the N