fifth - definition, thesaurus and related words from WordNet-Online

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Adjective fifth has 1 sense

fifth, 5th - coming next after the fourth and just before the sixth in position
Antonym: cardinal (indirect, via ordinal)

Noun fifth has 4 senses

fifth - a quantity of liquor equal to one fifth of a United States gallon
--₁ is a kind of United States liquid unit
fifth - position five in a countable series of things; "he was fifth out of several hundred runners"
--₂ is a kind of rank
one-fifth, fifth, fifth part, twenty percent - a fifth part
--₃ is a kind of common fraction, simple fraction
fifth - the musical interval between one note and another five notes away from it
--₄ is a kind of interval, musical interval