cosign

• co-sign

From co- + sign.

• (UK) IPA^(key): /ˈkəʊ.saɪn/
• (US) IPA^(key): /ˈkoʊ.saɪn/

• Audio (US):

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• Audio (UK):

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• Homophone: cosine

cosign (third-person singular simple present cosigns, present participle cosigning, simple past and past participle cosigned)

1. To sign a document jointly with another person, sometimes as an endorsement.
2. (informal, transitive) To agree with or endorse.
   • 2019 July 19, Noah Kulwin, “Democrats Fail the Left, Once Again”, in Jewish Currents‎^[1]:

     [Ilhan] Omar was left twisting in the wind earlier this year after facing spurious charges of antisemitism, a display of Democratic cowardice co-signed by Chelsea Clinton, Chuck Schumer, and most every other Democrat with a congressional leadership position.

cosign (plural cosigns)

1. The promotion of one musical artist (usually less successful) by another.
   • 2013, Jesse Atkinson, The Independent Music Grind:

     Also, you can't base your entire career on cosigns and big features. At some point, your music has to stand on its own.

   • 2017, Stormzy, Swifta Beater, “Cold” (track 15), in Gang Signs & Prayer, performed by Stormzy:

     Big pump, don't stunt when it's showtime / Kinda funny how I didn't need a cosign

• Scogin, coigns, cosing, incogs