- The definition of signatory is being bound by the signing of a document.
An example of signatory is the person who signed a rental agreement and is responsible for the rent.
- Signatory is defined as any of the people that signed a document.
An example of a signatory is a person who signed a contract.
signatory definition by Webster's New World
Origin: Classical Latin signatorius, of sealing, of a signer ; from signator, one who seals or signs ; from signare, to set a seal upon, sign: see sign
signatory definition by American Heritage Dictionary
Origin: Latin signātōrius, from signātus, past participle of signāre, to mark, from signum, sign; see sign.