quintile

American  

[kwin-til, -tahyl] / ˈkwɪn tɪl, -taɪl /

noun

1. Statistics. a quantile for the special case of five equal proportions.

2. Astrology. a quintile aspect.

---

adjective

1. Astrology. of or relating to the aspect of two heavenly bodies that are one fifth of the zodiac, or 72°, apart.

quintile British  

/ ˈkwɪntaɪl /

noun

1. an aspect of 72° between two heavenly bodies

2. a fifth part of a distribution

---

Etymology

Origin of quintile

1600–10; < Latin quīnt ( us ) fifth + -ile (as in quartile )

Example Sentences

See Examples For:

quintile

Here’s the result of a BofA screen showing companies with five-year projected earnings-per-share growth in the top quintile of the S&P 500 that the firm has rated buy:

From MarketWatch ● Aug. 25, 2026

The middle 20% of Americans earn as much as $105,500, and the next quintile earns as much as $175,700.

From The Wall Street Journal ● Jun. 26, 2026

His research paper, titled “You’re Not Hired,” found that employment of early career workers in the most AI-exposed quintile declined by 15% following the introduction of ChatGPT.

From MarketWatch ● Apr. 22, 2026

Comparing that index to the S&P 500 from 1985 to 2025, he found that stocks returned an average 19% when uncertainty was in its highest quintile versus an 11.6% return the rest of the time.

From Barron's ● Jan. 22, 2026

It is only "just after death" that man is a quintile, or fivefold in his constitution, for Prâna, as a distinctively human principle, cannot remain appropriated when its vehicle disintegrates.

From Death—and After? by Annie Wood Besant