sign on

verb

signed on; signing on; signs on
Synonyms of sign onnext

intransitive verb

1
: to engage oneself by or as if by a signature
signed on to the new project
2
: to announce the start of broadcasting for the day
sign-on
ˈsī-ˌnȯn How to pronounce sign on (audio)
-ˌnän
noun

Examples of sign on in a Sentence

I signed on for the crew team simply as a lark
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
On Tuesday, April 14, PEOPLE can exclusively reveal that the Maroon 5 frontman has signed on to coach on season 30 of the beloved singing competition show. Daniela Avila, PEOPLE, 15 Apr. 2026 That remained the case even after his longtime political consultants signed on to run an independent expenditure group that had been airing ads supporting Swalwell before immediately shutting down last Friday. Cnn.com Wire Service, Mercury News, 15 Apr. 2026 Kilmer, who died from throat cancer at 65, signed on to the project, but struggled with health issues once production began. Brian Niemietz, New York Daily News, 15 Apr. 2026 Gracing a new Faces of Death meta-reboot, showing up in the WTF historical fantasy 100 Nights of Hero, and signing on for a collaboration with Audition/Ichi the Killer auteur Takashi Miike? David Fear, Rolling Stone, 15 Apr. 2026 That has alarmed free-speech advocates and triggered federal and state-filed antitrust lawsuits, including one that the Colorado Attorney General’s office signed on to. John Wenzel, Denver Post, 14 Apr. 2026 Earle had been one of the first creators to host a podcast under the Unwell umbrella, signing on to the network in August 2023. Payton Turkeltaub, Variety, 13 Apr. 2026 Other names signing on include Adam McKay, Ben Stiller, Bryan Cranston, Catherine Keener, David Chase, Emma Thompson, Don Cheadle, James Schamus, Jane Fonda, Jason Bateman, Lin-Manuel Miranda, Noah Wyle, Tiffany Haddish, Mark Duplass, Joaquin Phoenix and Lily Gladstone. Ted Johnson, Deadline, 13 Apr. 2026 Pharma giants that haven’t signed on are working on their own in-house glue. Noelle Harff, San Diego Union-Tribune, 13 Apr. 2026

Word History

First Known Use

1879, in the meaning defined at sense 1

Time Traveler
The first known use of sign on was in 1879

Cite this Entry

“Sign on.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sign%20on. Accessed 16 Apr. 2026.

Kids Definition

sign on

verb
(ˈ)sī-ˈnȯn
-ˈnän
1
: to hire oneself by or as if by a signature
signed on as a member of the crew
2
: to announce the beginning of broadcasting

More from Merriam-Webster on sign on

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster