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

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

Examples of sign up in a Sentence

they both signed up for a Spanish class

Recent Examples on the Web

To sign up for the VIP presale, fans can visit a special link shared by Malik on his Instagram Story. —Hannah Dailey, Billboard, 22 Sep. 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. —Gabrielle Rockson, PEOPLE, 22 Sep. 2025

On Tuesday, a federal judge will begin hearing the Federal Trade Commission’s case against Amazon that alleges the company intentionally used manipulative practices to trick customers into signing up for the Prime membership service, and knowingly complicated the cancellation process. —Preston Fore, Fortune, 22 Sep. 2025

Check out our Daily Deals for the best products at the best prices and sign up here to receive the BestReviews weekly newsletter full of shopping inspo and sales. —Bestreviews, Mercury News, 22 Sep. 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