# X's and O's

> English word · Noun

## Definitions
1. tic-tac-toe
2. The fundamental elements of a play.
3. The basic delineation of roles in a project.

## Etymology
Derived from the use of the letters X and O as common stand-ins for other concepts.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/x-s-and-o-s