Definitions

1. adverb

in return for a benefit or advantage of eighty times the cost or effort expended

“The company’s profits have risen eightyfold since the investment.”

2. adverb

to a great degree or extent, especially in a positive or advantageous way

“He has grown eightyfold as a person since his time in college.”

3. noun

a quantity or degree of eighty times something

“The sales increase was an eightyfold rise in profits.”