A tool or device used for stamping, especially one used to imprint a design, mark, or seal on a surface. The notary used a stamper to emboss the official seal on the document.
A person who stamps, especially one who applies stamps to items such as letters or packages. The stamper at the post office was busy applying postage to the outgoing mail.
A machine that crushes ore or other material by pounding with heavy weights. The rhythmic thud of the stamper could be heard from the mine shaft all night.