reduction
noun
rɪˈdʌkʃn 
rɪˈdʌkʃn 
1 [countable, uncountable] reduction (in something) an act of making something less or smaller; the state of being made less or smallera 33% reduction in the number of hospital beds availableThere has been some reduction in unemployment.a slight/significant/substantial/drastic reduction in costsThe report recommends further reductions in air and noise emissions.2 [countable] an amount of money by which something is made cheaperThere are reductions for children sharing a room with two adults.3 [countable] a copy of a photograph, map, picture, etc. that is made smaller than the original oneOpposite
enlargement4 [uncountable, countable] (chemistry) the fact of adding one or more electrons to a substance or of removing oxygen from a substance compare oxidation