Definition of Cosignatory

Adjective: cosignatory  kow'sig-nu,to-ree [N. Amer], kow'sig-nu-t(u-)ree [Brit]

1. Signing jointly with others

Noun: cosignatory  kow'sig-nu,to-ree [N. Amer], kow'sig-nu-t(u-)ree [Brit]

1. One of two or more signers of the same document (as a treaty or declaration)
   - cosigner

See also:
cosignatories
cosigned