Fifth
From BiblePortal Wikipedia
Vine's Expository Dictionary of NT Words [1]
1: Πέμπτος (Strong'S #3991 — Adjective — pemptos — pemp'-tos )
akin to pente, "five," is found only in the Apocalypse, 6:9; 9:1; 16:10; 21:20.
Webster's Dictionary [2]
(1): ( a.) Consisting of one of five equal divisions of a thing.
(2): ( n.) The interval of three tones and a semitone, embracing five diatonic degrees of the scale; the dominant of any key.
(3): ( n.) The quotient of a unit divided by five; one of five equal parts; a fifth part.
(4): ( a.) Next in order after the fourth; - the ordinal of five.
King James Dictionary [3]
FIFTH, a. See Five.
1. The ordinal of five the next to the fourth. 2. Elliptically, a fifth part or the word may be considered as a noun, as to give a fifth or two fifths.
FIFTH, n. In music, an interval consisting of three tones and a semitone.
