the number equivalent to the product of five and ten; half of one hundred; 50:only fifty per cent of the aircraft were serviceableabout fifty of us filed ina fifty-pound salmon (Roman numeral: l or L)
(fifties) the numbers from 50 to 59, especially the years of a century or of a person’s life:Elvis is the icon of the Fifties
fifty years old:she looked about fifty
fifty miles an hour:I was doing about fifty
a size of garment or other merchandise denoted by fifty.
