Definition
An electrical component used to open, close, or redirect the path of current flow in a circuit. A switch makes or breaks the connection between conductors, allowing a circuit to be turned on, turned off, or routed to a different load.
Plain English
A device that lets you turn an electrical circuit on or off, or send the electricity down a different path.
Context Anchor
Pilots encounter switches on cockpit panels, checklists, and electrical system descriptions.
Derivation
From the older English word 'swich,' meaning a thin, flexible rod or stick. Early electrical switches used a small lever or rod to make and break contact, and the name carried over to the modern device.
Why Pilots Care
Correct switch operation ensures systems receive power only when needed and prevents battery drain or accidental activation during flight.
Intuition Check
Do not think of a switch as only the visible lever or button. In aviation maintenance and systems, the word usually includes the electrical action inside: making, breaking, or changing the path for electricity.
Example Sentence 1
Before engine start, the pilot turned the master switch on to power the aircraft's electrical system.
Example Sentence 2
During shutdown, the pilot verified all switches were in the off position to avoid draining the battery overnight.