WordReference Random House Unabridged Dictionary of American English © 2026
quin•tile
(kwin′til, -tīl),USA pronunciation n.
adj.
- Statisticsa quantile for the special case of five equal proportions.
- Astrologya quintile aspect.
adj.
- Astrologyof or pertaining to the aspect of two heavenly bodies that are one fifth of the zodiac, or 72°, apart.
- Latin quīnt(us) fifth + -ile (as in quartile)
- 1600–10
'quintile' also found in these entries (note: many are not synonyms or translations):