sign up

verb

signed up; signing up; signs up

intransitive verb

: to sign one's name (as to a contract) in order to obtain, do, or join something

sign up for insurance

sign up for classes

sign-up

ˈsī-ˌnəp 

noun or adjective

Synonyms

• enlist (in)
• enroll (in)
• enter
• join
• sign on (for)

Examples of sign up in a Sentence

they both signed up for a Spanish class

Recent Examples on the Web

For the latest updates, sign up for breaking news alerts. —Amy McDaniel, Fort Worth Star-Telegram, 10 Jan. 2025

Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories. —Becca Longmire, People.com, 10 Jan. 2025

Fink says Moderna expects to finish signing up volunteers in the spring, and plans to follow them for at least six months. —Alice Park, TIME, 10 Jan. 2025

The Environmental Protection Agency (EPA) recommends that residents sign up for air quality email alerts for their ZIP code to stay informed about changing conditions. —Hannah Parry, Newsweek, 11 Dec. 2024

Word History

First Known Use

1875, in the meaning defined above

Kids Definition

sign up

verb

(ˈ)sī-ˈnəp

: to sign one's name in order to get, do, or take something

signed up for Spanish

sign-up noun or adjective