pron.

1.第5，第五（个）

n.

1.五分之一

词形变化

副词fifthly

英语解释

coming next after the fourth and just before the sixth in position

one part in five equal parts

position five in a countable series of things

the musical interval between one note and another five notes away from it

a quantity of liquor equal to one fifth of a United States gallon