- A person or state signing a treaty or other document jointly with others: this does not diminish the British obligation to our co-signatoriesMore example sentences
- Hamm and his co-signatories asked in their open letter to the president.
- There are co-signatories to this theory.
- The issue was dropped from the convention itself because some cosignatories opposed a ban.
More definitions of co-signatoryDefinition of co-signatory in:
- The US English dictionary