Definition of decrease verb from the Oxford Advanced Learner's Dictionary

  

decrease

 verb
verbVerb Forms present simple I / you / we / they decrease
BrE BrE//dɪˈkriːs//
 
; NAmE NAmE//dɪˈkriːs//
 
he / she / it decreases
BrE BrE//dɪˈkriːsɪz//
 
; NAmE NAmE//dɪˈkriːsɪz//
 
past simple decreased
BrE BrE//dɪˈkriːst//
 
; NAmE NAmE//dɪˈkriːst//
 
past participle decreased
BrE BrE//dɪˈkriːst//
 
; NAmE NAmE//dɪˈkriːst//
 
-ing form decreasing
BrE BrE//dɪˈkriːsɪŋ//
 
; NAmE NAmE//dɪˈkriːsɪŋ//
 
Trends
 
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BrE BrE//dɪˈkriːs//
 
; NAmE NAmE//dɪˈkriːs//
 
[intransitive, transitive] (rather formal) to become or make something become smaller in size, number, etc. decrease (from something) (to something) The number of new students decreased from 210 to 160 this year. a decreasing population Donations have decreased significantly over the past few years. decrease by something The price of wheat has decreased by 5%. decrease in something This species of bird is decreasing in numbers every year. decrease something People should decrease the amount of fat they eat. opposite increase See related entries: Trends
Word Origin late Middle English: from Old French decreis (noun), decreistre (verb), based on Latin decrescere, from de- ‘down’ + crescere ‘grow’.Extra examples Average family size has decreased from five to three children. Crime has decreased by 20 per cent. Spending has decreased slightly this year. The heart gradually decreases in size. The number of quarrels among children decreases with age. The dose was gradually decreased after eight weeks.
See the Oxford Advanced American Dictionary entry: decrease

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