denoting a person or thing having the position in a sequence corresponding to the number five
one of five equal parts of something
the fifth and usu highest forward gear of a motor vehicle
in music, an interval of five degrees of a diatonic scale, or the combination of two notes at such an interval
= dominant2 (3)
take the fifth
in the USA, to refuse to testify as a witness against oneself, in accordance with the Fifth Amendment to the Constitution
fifthly adv
[Old English fīfta]