from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Signed jointly.
  • n. One who cosigns.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. signed or signing jointly
  • n. Any of several people who sign a document together (especially a treaty)

from The Century Dictionary and Cyclopedia

  • Uniting with another or others in signing, as a treaty or agreement: as, cosignatory powers.
  • n. One who unites with another or others in signing a treaty or agreement.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. signing jointly with others
  • n. one of two or more signers of the same document (as a treaty or declaration)


from Wiktionary, Creative Commons Attribution/Share-Alike License

cosign +‎ -atory


  • “Remember how I tricked you into signing me on as a cosignatory on your home-equity loan?”

    Promise Me

  • When he asked to be a cosignatory, his accessing my entire account had never even crossed my mind.

    Promise Me

  • As we were finishing the paperwork, Matthew asked, Do you mind if we make me a cosignatory on the loan?

    Promise Me

  • Philip Pullman, her fellow author and cosignatory, said he would never have signed if he had known the Lib Dems would ally with the Conservatives. - Telegraph online, Daily Telegraph and Sunday Telegraph

  • In America, Olivier finds to his horror that he can't take any money out of the bank without Parrot's approval - his parents have made Parrot the cosignatory to his account. news, business, sport, the Daily Telegraph newspaper, Sunday Telegraph

  • The Misguided Search for the 'One Law - and the Ongoing Struggle to Articulate it Correctly' available at SSRN)), accept the legitimacy of consulting foreign cosignatory law in construing treaties (see, e.g.,



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