* Circuit* may mean:

- Circuit theory, the theory of accomplishing work by routing electrons, gas, fluids, or other matter through loops (e.g., electrical, hydraulic or pneumatic circuits)

In **electrical engineering**

- Electrical circuit, an electrical network that has a closed loop giving a return path for the current
- Circuit analysis, the process of finding the voltages across, and the currents through, every component in an electrical circuit
- Electronic circuit, active electronic components connected in a circuit
- Analog circuit or Digital circuit
- Integrated circuit
- Mixed-signal integrated circuit

- Asynchronous circuit or Synchronous circuit
- Printed circuit board (PCB)
- Series and parallel circuits
- Telecommunication circuit
- Circuit diagram
- Balanced circuit
- LC circuit

In **fluid power** and **fluid mechanics**

- Hydraulic circuit
- Pneumatic circuit

In **physics**

- Magnetic circuit, one or more closed loop paths containing a magnetic flux

In **mathematics** and **computer science**

- Circuit (computer theory), a theoretical structure simulating electrical and data paths
- Boolean circuit
- Integer circuit, a mathematical object of computational complexity

- Circuit complexity, a branch of computational complexity theory
- Cycle (graph theory), a closed path, with no other repeated vertices than the starting and ending vertices
- Matroid circuit, in combinatorics

In **neuroscience**

- Biological neural network, a neuronal circuit

In **economics**

- Monetary circuit theory, a heterodox theory of monetary economics; also called
*circuitism*

In **government** and **law**

- Circuit (administrative division), an administrative country subdivision in East Asia
- Circuit court, the name of court systems in several common law jurisdictions

In **transportation** and **racing**

- Circuit (airfield), also called the pattern, a standard path followed by aircraft when taking off or landing
- Kart circuit
- Formula One circuits (see List of Formula One circuits)
- Race track

Others

- "Circuit", a character from the
*Munna Bhai*film series - Circuit (LCMS), local grouping of congregations in the Lutheran Church - Missouri Synod
*Circuit*(film), a 2001 gay-themed film set in the world of gay circuit parties- Circuit party, a gay dance event
- Methodist Circuit, a church governance in Methodism
*Circuital*, a 2011 album by My Morning Jacket

### Famous quotes containing the word circuit:

“We are all hostages, and we are all terrorists. This *circuit* has replaced that other one of masters and slaves, the dominating and the dominated, the exploiters and the exploited.... It is worse than the one it replaces, but at least it liberates us from liberal nostalgia and the ruses of history.”

—Jean Baudrillard (b. 1929)

“each new victim treads unfalteringly

The never altered *circuit* of his fate,

Bringing twelve peers as witness

Both to his starry rise and starry fall.”

—Robert Graves (1895–1985)

“The Father and His angelic hierarchy

That made the magnitude and glory there

Stood in the *circuit* of a needle’s eye.”

—William Butler Yeats (1865–1939)