plural fifths
ˈfiths
ˈfif(t)ths,
ˈfif(t)s
1
: one that is number five in a series
Payment is due on the fifth of the month.
see Table of Numbers
2
: one of five equal parts of something
spent a fifth of their income on rent
3
a
: the musical interval embracing five diatonic degrees
b
: a tone at this interval
specifically
: dominant sense 1
c
: the harmonic combination of two tones at this interval
4
: a unit of measure for liquor equal to one fifth of a U.S. gallon (0.757 liter)
5
the Fifth
: the Fifth Amendment of the U.S. Constitution
also
: the right accorded by the Fifth Amendment to refuse to testify against oneself see also plead the fifth, take the fifth
fifth
adjective or adverb
the fifth annual food festival
She finished fifth in the race.
fifthly
adverb
Fourthly, it takes a lot of concrete to make a nuclear power plant. Fifthly, there is no place to put the waste that is safe.
—Victor Odlivak
Cite this Entry
“Fifth.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fifth. Accessed 14 Oct. 2026.
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