reducing

1. To bring down the size, quantity, quality, value or intensity of something; to diminish, to lower.

   to reduce weight, speed, heat, expenses, price, personnel etc.

2. To lose weight.
3. To bring to an inferior rank; to degrade, to demote.

   Hester Prynne was shocked at the condition to which she found the clergyman reduced.

4. To humble; to conquer; to subdue; to capture.

   to reduce a province or a fort

5. To bring to an inferior state or condition.

   to reduce a city to ashes

6. To decrease the liquid content of food by boiling much of its water off.
7. To add electrons / hydrogen or to remove oxygen.
8. To produce metal from ore by removing nonmetallic elements in a smelter.
9. To simplify an equation or formula without changing its value.
10. To express the solution of a problem in terms of another (known) algorithm.
11. To convert a syllogism to a clearer or simpler form
12. To convert to written form. (Usage note: this verb almost always appears as "reduce to writing".)

    It is important that all business contracts be reduced to writing.

13. To perform a reduction; to restore a fracture or dislocation to the correct alignment.
14. To reform a line or column from (a square).
15. To strike off the payroll.
16. To annul by legal means.
17. To translate (a book, document, etc.).

    a book reduced into English

adjective

That causes reduction.