Definition from Wiktionary, the free dictionary
- (figuratively) Of a person, organisation, or process, making decisions or approving matters routinely or without real power, as rubber stamp politics, a rubber stamp committee.
- A piece of rubber or similar material with a design or text carved or molded for the purpose of transferring ink or dye to imprint that design on another object.
- The library had a rubber stamp to imprint the due date.
- (figuratively) A person or organisation who approves, routinely or as a formality, matters decided by some other person or organisation.
piece of rubber to make an imprint