Definition of reduces:
(v) :
(transitive) To bring down the size, quantity, quality, value or intensity of something; to diminish, to lower.
(v) :
(intransitive) To lose weight.
(v) :
(transitive) To bring to an inferior rank; to degrade, to demote.
(v) :
(transitive) To bring to an inferior state or condition.
(v) :
(transitive) To humble; to conquer; to subdue; to capture.
(v) :
(transitive, cooking) To decrease the liquid content of (a food) by boiling much of its water off.