First Known Use: 1508
Dictionary
1reflex
noun re·flex \ˈrē-ˌfleks\
: an action or movement of the body that happens automatically as a reaction to something
: something that you do without thinking as a reaction to something
reflexes : the natural ability to react quickly
Full Definition of REFLEX
1
a archaic : reflected heat, light, or color b : a mirrored image c : a copy exact in essential or peculiar features
2
a : an automatic and often inborn response to a stimulus that involves a nerve impulse passing inward from a receptor to a nerve center and thence outward to an effector (as a muscle or gland) without reaching the level of consciousness — compare habit 7 b : the process that culminates in a reflex and comprises reception, transmission, and reaction —called also reflex action c plural : the power of acting or responding with adequate speed d : a way of thinking or behaving
3
: a linguistic element (as a word or sound) or system (as writing) that is derived from a prior and especially an older element or system <boat is the reflex of Old English bāt>
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Origin of REFLEX
Latin reflexus, past participle of reflectere to reflect
Rhymes with REFLEX
2reflex
adjective
Definition of REFLEX
1
: directed back on the mind or its operations : introspective
2
: reflexed
3
: produced or carried out in reaction, resistance, or return
4
of an angle : being between 180° and 360°
5
: of, relating to, or produced by a reflex without intervention of consciousness
— re·flex·ly adverb
Origin of REFLEX
Latin reflexus
First Known Use: 1649
REFLEX[1] Defined for Kids
reflex
noun re·flex \ˈrē-ˌfleks\
Definition of REFLEX for Kids
1
: an action or movement that is made automatically without thinking as a reaction to a stimulus
2
re·flex·es plural : the natural ability to react quickly <A driver needs good reflexes.>
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