knee-jerk Meaning in the Cambridge English Dictionary
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Meaning of “knee-jerk” in the English Dictionary

"knee-jerk" in British English

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knee-jerkadjective

uk   /ˈniː.dʒɜːk/  us   /-dʒɝːk/ disapproving
knee-jerk reaction, response, etc. a ​quickreaction that does not ​allow you ​time to ​consider something ​carefully
(Definition of knee-jerk from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"knee-jerk" in American English

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knee-jerkadjective

 /ˈniˌdʒɜrk/
happening or ​existing as a ​result of ​habit, ​rather than ​carefulconsideration: When ​asked about ​crime, the mayor’s knee-jerk ​reaction is to ​call for ​longerprisonsentences.
(Definition of knee-jerk from the Cambridge Academic Content Dictionary © Cambridge University Press)
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