# POSIX

> English word · Proper noun · IPA /ˈpɒz.ɪks/ · frequency rank #74,404

## Definitions
1. Acronym of Portable Operating System Interface, a set of IEEE standards designed to provide application portability between Unix variants.

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