A Quick and Simple Dictionary

reduce

1. Verb.  (transitive) To bring down the size, quantity, quality, value or intensity of something; to diminish, to lower, to impair.
2. Verb.  (intransitive) To lose weight.
3. Verb.  (transitive) To bring to an inferior rank; to degrade, to demote.
4. Verb.  (transitive) To humble; to conquer; to subdue; to capture.
5. Verb.  (transitive) To bring to an inferior state or condition.
6. Verb.  (transitive, cooking) To decrease the liquid content of food by boiling much of its water off.
7. Verb.  (transitive, chemistry) To add electrons / hydrogen or to remove oxygen.
8. Verb.  (transitive, metallurgy) To produce metal from ore by removing nonmetallic elements in a smelter.
9. Verb.  (transitive, mathematics) To simplify an equation or formula without changing its value.
10. Verb.  (transitive, legal) To convert to written form (Usage note: this verb almost always take the phrase "to writing").