1. a person who signs a document, contract, or agreement
2. a person who communicates using sign language

Examples

• Each signer of the contract received a copy for their records.
• The Declaration of Independence had 56 signers.
• All signers must provide valid identification before the ceremony.
• The mortgage requires both spouses to be signers on the loan.
• She works as a professional signer for deaf students in college classes.
• The signer interpreted the speech for the hearing-impaired audience.
• Every signer on the petition supported the new park proposal.