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 of sign up

• 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

That is why checking your own property records and signing up for any free local alerts should remain part of your protection plan. — Kurt Knutsson, FOXNews.com, 3 Oct. 2026

The website also urges those who sign up to check what time each cafe is open for business before visiting. — Anne Ewbank, Sacbee.com, 3 Oct. 2026

Following his bankruptcy, Thomas signed up for Pennsylvania's self-exclusion list. — Bobby Allyn, NPR, 2 Oct. 2026

QuickBooks Free Learn More On Intuit’s site Cost 100% free with no credit card required to sign up. — Carson Brunson, CNBC, 2 Oct. 2026

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