disc.

noun

1. A reduction in price.

   This store offers discounts on all its wares. That store specializes in discount wares, too.

2. A deduction made for interest, in advancing money upon, or purchasing, a bill or note not due; payment in advance of interest upon money.

3. The rate of interest charged in discounting.

4. (transactional analysis) The act of one who believes, or act as though they believe, that their own feelings are more important than the reality of a situation.