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noun, often attributive cir·cuit \ˈsər-kət\

Simple Definition of circuit

  • : a series of performances, sports events, lectures, etc., that are held or done at many different places

  • : a path or trip around something

  • : the complete path that an electric current travels along

Source: Merriam-Webster's Learner's Dictionary

Full Definition of circuit

  1. 1 a :  a usually circular line encompassing an area b :  the space enclosed within such a line

  2. 2 a :  a course around a periphery b :  a circuitous or indirect route

  3. 3 a :  a regular tour (as by a traveling judge or preacher) around an assigned district or territory b :  the route traveled c :  a group of church congregations ministered to by one pastor

  4. 4 a :  the complete path of an electric current including usually the source of electric energy b :  an assemblage of electronic elements :  hookup c :  a two-way communication path between points (as in a computer) d :  a neuronal pathway of the brain along which electrical and chemical signals travel

  5. 5 a :  an association of similar groups :  league b :  a number or series of public outlets (as theaters, radio shows, or arenas) offering the same kind of presentation c :  a number of similar social gatherings <the cocktail circuit>


play \-kə-təl\ adjective

Examples of circuit in a sentence

  1. It takes a year for the Earth to make one circuit around the sun.

Origin and Etymology of circuit

Middle English, from Middle French & Latin; Middle French circuite, from Latin circuitus, from circumire, circuire to go around, from circum- + ire to go — more at issue

First Known Use: 14th century



verb cir·cuit

Definition of circuit

  1. transitive verb
  2. :  to make a circuit about

  3. intransitive verb
  4. :  to make a circuit

Examples of circuit in a sentence

  1. <after circuiting the exterior of the church, the procession headed inside>

15th Century

First Known Use of circuit

15th century

CIRCUIT Defined for Kids


noun cir·cuit \ˈsər-kət\

Definition of circuit for Students

  1. 1 :  a boundary line around an area

  2. 2 :  an enclosed space

  3. 3 :  movement around something <The earth makes a circuit around the sun.>

  4. 4 :  a regular tour of service (as by a judge) around an assigned territory :  a course so traveled

  5. 5 :  a series of performances, competitions, or appearances held at many different places <the pro tennis circuit>

  6. 6 :  the complete path of an electric current

  7. 7 :  a group of electronic parts

Medical Dictionary


noun cir·cuit \ˈsər-kət\

Medical Definition of circuit

  1. 1:  the complete path of an electric current including usually the source of electric energy

  2. 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>

Law Dictionary


noun cir·cuit

Legal Definition of circuit

  1. 1a :  a route formerly taken by traveling judges b :  a district established within a state or the federal judicial system

  2. 2 capitalized :  the court of appeals for a circuit in the federal judicial system <after the 9th Circuit's ruling — V. M. Sher>

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