Medical Definition of circuit
1: the complete path of an electric current including usually the source of electric energy
2: a neuronal pathway of the brain along which electrical and chemical signals travel <… the neurons in this brain circuit communicate using the chemical messenger dopamine.—Helen Fisher, The Wall Street Journal, 13 Feb. 2004>
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Dictionary: Definition of "circuit" Thesaurus: All synonyms and antonyms for "circuit" Spanish Central: Translation of "circuit" Nglish: Translation of "circuit" for Spanish speakers Britannica English: Translation of "circuit" for Arabic speakers Britannica.com: Encyclopedia article about "circuit"
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