Longman Dictionary of Contemporary English homepage

reduction

noun
     
re‧duc‧tion S3 W2
[uncountable and countable] a decrease in the size, price, or amount of something, or the act of decreasing something:
strategies for noise reduction
reduction in
a slight reduction in the price of oil
reduction of
the reduction of interest rates
reduction on
substantial reductions on children's clothes
The company promised they would make no staff reductions for at least two years.

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