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English definition of “reflex”

reflex

noun uk   /ˈriː.fleks/ us  
[C] a physical reaction to something that you cannot control: I'm sorry I punched him, it was a reflex action/response. reflexes [plural] the ability to react quickly: Fighter pilots need good/fast reflexes.

reflex

adjective uk   /ˈriː.fleks/ specialized us  
describes an angle that is more than 180° and less than 360°
(Definition of reflex from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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