Cutout definition1. A form of bypass valve , located in the exhaust line, that can be used to divert the flow of exhaust from one pipe to another. Often used to bypass the muffler into a straight pipe. See exhaust cutout .
2. A device to connect or disconnect the generator from the battery circuit. When the generator is charging, cutout makes circuit, when generator stops, cutout breaks circuit. Also referred to as "cutout relay," and "circuit breaker ."
3. A portion of a panel which has been removed so that a cover can be inserted.