What does COUNTER mean?

noun

1. table consisting of a horizontal surface over which business is transacted
2. game equipment (as a piece of wood, plastic, or ivory) used for keeping a count or reserving a space in various card or board games
3. a calculator that keeps a record of the number of times something happens
4. a piece of furniture that stands at the side of a dining room; has shelves and drawers
5. a person who counts things
6. a quick reply to a question or remark (especially a witty or critical one)“it brought a sharp rejoinder from the teacher”
7. (computer science) a register whose contents go through a regular series of states (usually states indicating consecutive integers)
8. a piece of leather forming the back of a shoe or boot“a counter may be used to stiffen the material around the heel and to give support to the foot”