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English definition of “deteriorate”

deteriorate

verb [I] uk   /dɪˈtɪə.ri.ə.reɪt/ us    /-ˈtɪr.i-/
C1 to become worse: She was taken into hospital last week when her condition suddenly deteriorated. The political situation in the region has deteriorated rapidly.Deteriorating and making worse
deterioration
noun [C or U] uk   /dɪˌtɪə.ri.əˈreɪ.ʃən/ us    /-ˌtɪr.i-/
We've seen a deterioration in relations between the countries.Deteriorating and making worse
(Definition of deteriorate from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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