Fifth

'Fifth'

[fifth.n.01] as in: a quantity of liquor equal to one fifth of a United States gallon

'Fifth'

[fifth.n.02] as in: position five in a countable series of things

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Examples:
he was fifth out of several hundred runners

'Fifth'

[one-fifth.n.01] as in: one part in five equal parts

'Fifth'

[fifth.n.04] as in: the musical interval between one note and another five notes away from it

'Fifth'

[fifth.s.01] as in: coming next after the fourth and just before the sixth in position