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

Disasi may have to sign up for a similar arrangement, despite performing solidly on loan for Villa and for West Ham United in the last two seasons. — Liam Twomey, New York Times, 19 Aug. 2026

Our students would sign up for extra tutoring sessions that many of us offered after class. — Ethan Gologor, New York Daily News, 19 Aug. 2026

Receive a comprehensive breakdown of talent showcasing this year by signing up for our Comedy Means Business newsletter at this link. — Matt Grobar, Deadline, 19 Aug. 2026

To track a ballot’s progress once it is turned in, voters can sign up to receive updates from the Supervisor of Elections Office. — Ruth Abramovitz, Sun Sentinel, 13 Aug. 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