# outlier

> English word · Noun · IPA /ˈaʊtˌlaɪə(ɹ)/ · frequency rank #34,621

## Definitions
1. A person or thing situated away from the main body or outside its proper place.
2. An exception.
3. A part of a formation separated from the rest of the formation by erosion.
4. A value in a statistical sample which does not fit a pattern that describes most other data points; specifically, a value that lies 1.5 IQR beyond the upper or lower quartile.

## Etymology
From outlie + -er.

## Easily confused with
- **outline** (https://plainspell.com/en/vs/outlier-vs-outline)
- **outlive** (https://plainspell.com/en/vs/outlier-vs-outlive)
- **outsider** (https://plainspell.com/en/vs/outlier-vs-outsider)
- **outer** (https://plainspell.com/en/vs/outer-vs-outlier)
- **outlet** (https://plainspell.com/en/vs/outlet-vs-outlier)

## Common misspellings (9)
`otulier`, `oultier`, `outiler`, `outleir`, `outlierr`, `outlire`, `outllier`, `outtlier`, `uotlier`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/outlier