Word.ws English Dictionary

cosign

/ˈkəʊ.saɪn//ˈkoʊ.saɪn/

cosign verb: to sign a document jointly with another person, sometimes as an endorsement.

Verb

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.
    • [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.2019 July 19, Noah Kulwin, “Democrats Fail the Left, Once Again”, in Jewish Currents

Noun

cosign (plural cosigns)

  1. The promotion of one musical artist (usually less successful) by another.
    • Also, you can't base your entire career on cosigns and big features. At some point, your music has to stand on its own.2013, Jesse Atkinson, The Independent Music Grind
    • Big pump, don't stunt when it's showtime / Kinda funny how I didn't need a cosign2017, Stormzy, Swifta Beater, “Cold” (track 15), in Gang Signs & Prayer, performed by Stormzy

Forms of cosign

Verb
third-person singular presentcosigns
present participlecosigning
past participlecosigned
pastcosigned
alternative formco-sign
Noun
pluralcosigns

Past tense of cosign: cosigned

Origin of cosign

From co- + sign.

Words formed from cosign

Questions about cosign

What does cosign mean?
Cosign means to sign a document jointly with another person, sometimes as an endorsement.
What part of speech is cosign?
Cosign can be a verb or a noun.
How do you pronounce cosign?
Cosign is pronounced /ˈkəʊ.saɪn/ (UK).
What is the past tense of cosign?
The past tense of cosign is cosigned.

Words near cosign in the dictionary

  1. cosies along
  2. cosies up
  3. cosies up to
  4. cosiest
  5. cosified
  6. cosign
  7. cosignal
  8. cosignals
  9. cosignatories
  10. cosignatory
  11. cosigned

Source and license

Adapted from Wiktionary: cosign (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Pronunciation audio from Wikimedia Commons, each file under its own free license: en-us-cosign.ogg, en-uk-cosign.ogg.

Cite this entry: “cosign.” Word.ws, https://word.ws/cosign. Based on Wiktionary, CC BY-SA 4.0.