sign on

verb

signed on; signing on; signs on

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.
When the movie was first announced, it was revealed that Chris Pratt signed on to be the lead. James Brizuela, MSNBC Newsweek, 11 Nov. 2025 Trump could chalk up some progress as countries signed on, and Ukraine would get a morale boost at the start of a long and difficult winter. Thomas Wright, The Atlantic, 11 Nov. 2025 The proclamation appeared to have been signed on Friday. NPR, 11 Nov. 2025 The movie will be developed through Universal Pictures, with Marc Platt signed on as a producer. Jon Blistein, Rolling Stone, 11 Nov. 2025 Keith Richards had already signed on as music director and was putting together a great backup band, but both Keith and I also wanted some world-class guest artists to collaborate with Chuck onstage. Taylor Hackford, Air Mail, 8 Nov. 2025 By the end of that year, 1 million people had signed on to the secure and confidential database. Kurt Snibbe, Oc Register, 7 Nov. 2025 But without Congressional Republicans signing on, the Democrats cannot even take the step of issuing a subpoena — which offers legal weight to force a person to appear. Christian Edwards, CNN Money, 6 Nov. 2025 Netflix signed on to produce her next comedy special. Zak Cheney-Rice, Vulture, 6 Nov. 2025

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 13 Nov. 2025.

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

Last Updated: - Updated example sentences
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