# sign up

> English word · Verb

## Definitions
1. To add a name to the list of people who are participating in something.
2. To add one's own name to the list of people who are participating in something (including amateur, but not professional, teams).
3. To agree to purchase some good or service.
4. To enlist in the armed forces.

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