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

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, Chicago Tribune, 14 Aug. 2025

And sign up for our free Let’s Dish newsletter for biweekly feeds of Rachel’s latest eats and recent restaurant industry news. —Kansas City Star, 14 Aug. 2025

United’s chief business officer, who made a good impression during his speech, has brought all arms of income under his remit and is making a start on signing up sponsors. —Laurie Whitwell, New York Times, 14 Aug. 2025

People can also sign up on the website to volunteer once the nonprofit is back up and running. —Erik S. Hanley, jsonline.com, 14 Aug. 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