Tra từ decrease - Từ điển tiếng Anh - Cambridge Advanced Learners Dictionary

decrease verb intransitive or transitive UK [dɪˈkriːs] US [ˈdiː.kriːs] [ decreases decreasing decreased ]
<I > to become less, or to make something become less
• Our share of the market has decreased sharply this year.
• We have decreased our involvement in children's books.
Opposite increase
Thesaurus⁺: ↑Becoming and making smaller or less ↑Becoming and making less strong

• During the 1980s, the amount of ozone in the stratosphere above Europe decreased by about 8%.
• Total unemployment has decreased in the past year.
• The pop star's popularity decreased as he got older, which is only to be expected.
• The government proposed decreasing the annual expenditure on arms.
• To make the sleeve get narrower toward the cuff, you gradually decrease the number of stitches on your needle.

noun countable or uncountable UK US [ˈdiː.kriːs]
<I > a reduction
• There has been a steady decrease in the number of visitors.
• I haven't noticed much decrease in interest.
Thesaurus⁺: ↑Becoming and making smaller or less ↑Becoming and making less strong

Common errors:
When you are talking about the thing that has decreased, the most usual preposition to use after decrease is in.
Don't say 'a decrease of something', say a decrease in something:
• There has been a 2% decrease in the rate of unemployment.
When decrease is followed by an amount, the correct preposition is of:
• There has been a decrease of 2%.

• There was a slight decrease in his weight after a week of dieting.
• Any decrease in tourism could have a serious effect on the local economy.
• The report's finding on the decrease in violent crime supports the police chief's claims.
• We have seen a marked decrease in the number of accidents since these safety measures were introduced.
• We've noticed a steady decrease in jobs available for new graduates in the industry.