A small piece of printed paper stuck on an item to be mailed, indicating that postage has been paid. / (figuratively, colloquial) A very small area.

a revenue stamp

(figuratively) Of a person, organisation, or process, making decisions or approving matters routinely or without real power.

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.

(figuratively) To process, approve or decide matters routinely rather than through careful consideration.

Alternative spelling of rubber stamp.

Alternative spelling of rubber stamp.

a small paper coupon, given by a retailer to a customer; they may be saved up and redeemed for goods

The hobby of collecting and displaying postage stamps and related items. / (figuratively, usually derogatory) Collection of items or information of no intrinsic value.

plural of rubber stamp