Stamp  —v. 1 a bring down (one's foot) heavily, esp. On the ground. B (often foll. By on) crush or flatten in this way. C walk heavily. 2 a impress (a design, mark, etc.) On a surface. B impress (a surface) with a pattern etc. 3 affix a postage or other stamp to. 4 assign a specific character to; mark out. —n. 1 instrument for stamping. 2 a mark or design made by this. B impression of an official mark required to be made on deeds, bills of exchange, etc., as evidence of payment of tax. 3 small adhesive piece of paper indicating that payment has been made, esp. A postage stamp. 4 mark or label etc. On a commodity as evidence of quality etc. 5 act or sound of stamping the foot. 6 characteristic mark or quality.  stamp on 1 impress (an idea etc.) On (the memory etc.). 2 suppress.