cosign
Americanverb (used with or without object)
Etymology
Origin of cosign
Explanation
When you cosign a document, you sign it with another person. You and your business partner might cosign a lease for your new office space. You can use the verb cosign in two slightly different ways. First, if two (or more) people put their signatures on a form or letter, you can say they cosign it. In some cases — particularly when you're applying for a loan — a financial institution will require that you have someone cosign, essentially promising that if you can't repay the loan, he or she will be responsible for it. The word dates from the mid-20th century.
Vocabulary lists containing cosign
Personal Finance and Financial Literacy - Introductory
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Personal Finance and Financial Literacy - High School
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Personal Finance and Financial Literacy - Middle School
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Anne Hathaway, Emily Blunt and Stanley Tucci will also reprise their roles for the highly anticipated movie, whose predecessor last year finally received a cosign from Anna Wintour.
From Los Angeles Times ● Apr. 2, 2026
A harsher critic might argue that your friend’s relative could have chosen a cheaper car, and bought a vehicle within his budget — without asking a friend to cosign his loan.
From MarketWatch ● Nov. 29, 2025
It is naive to use it solely to cosign an individual’s character; not to say that character doesn’t count — it does — but rather that its primacy is a fallacy.
From Seattle Times ● Dec. 15, 2023
And Ja Rule is happy, as always, to cosign what’s to come: “So much Utility with this project it’s insane!!!” he tweeted.
From The Verge ● Feb. 23, 2022
Not only that, but he would have to cosign them or they wouldn’t count.
From "Schooled" by Gordon Korman
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
