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: one that reacts
: a device (such as a coil, winding, or conductor of small resistance) used to introduce reactance into an alternating-current circuit
: a vat for an industrial chemical reaction
: a device for the controlled release of nuclear energy (as for producing heat)
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These example sentences are selected automatically from various online news sources to reflect current usage of the word 'reactor.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
1890, in the meaning defined at sense 1
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Resources for reactor
10 Sep 2018
Time Traveler for reactor
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More Definitions for reactor
physics : a large device that produces nuclear energy
See the full definition for reactor in the English Language Learners Dictionary
: a device using atomic energy to produce heat
: one that reacts: as
: a chemical reagent
: an individual reacting to a stimulus
: an individual reacting positively to a foreign substance (as in a test for disease)
reactors to tuberculin
: a piece of equipment in which a chemical reaction and especially an industrial chemical reaction is carried out
More from Merriam-Webster on reactor
See words that rhyme with reactor
Spanish Central: Translation of reactor
Nglish: Translation of reactor for Spanish Speakers
Britannica English: Translation of reactor for Arabic Speakers
Britannica.com: Encyclopedia article about reactor
Comments on reactor
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the setting in which something occurs
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