1. the number 80

1. the numbers from 80 to 89, especially when referring to someone’s age or to a decade

Examples

• There are eighty students in the graduating class.
• The speed limit on this highway is eighty miles per hour.
• My grandmother is in her eighties and still very active.
• The temperature reached eighty degrees yesterday.
• He scored eighty percent on the exam.
• The nineteen eighties were known for distinctive music and fashion.
• Count by tens: ten, twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety, one hundred.