- The definition of undersigned is whoever signed at the bottom or end of something.
An example of undersigned is the person's name that is signed at the bottom of a contract.
This name is the undersigned.
- signed at the end
- whose name or names are signed at the end
- Signed or having signed at the bottom or end of a document: the undersigned names; the undersigned people.
- Having signatures or a signature at the bottom or end. Used of documents.
(comparative more undersigned, superlative most undersigned)