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

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 celebrity news to compelling human interest stories. —Stephanie Guerilus, People.com, 15 June 2025

Additionally, customers who sign up or the Red Robin Royalty program can get a free appetizer upon sign up. —Gabe Hauari, USA Today, 15 June 2025

Click here to sign up with the new member offer and get $150 in bonus bets with an opening $5 wager or get a $1,000 first bet offer. —Tyler Everett, MSNBC Newsweek, 15 June 2025

For those who don’t have Prime accounts and do not wish to sign up, individual episodes and seasons are also available for purchase on Amazon. —Erin Lassner, HollywoodReporter, 14 June 2025

Word History

First Known Use

1875, in the meaning defined above

Rhymes for sign up

• backup
• blowup
• breakup
• buildup
• checkup
• cleanup
• holdup
• hookup
• lineup
• lockup
• makeup
• markup

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