interlock

/ˌɪntərˈlɑk/
verb
  1. To fit or lock together so that movement is joined or prevented.
    • The children interlocked their arms and walked down the street together.
    • The pieces of the puzzle interlock perfectly to form a picture.
    • The gears interlock to transfer power from the engine to the wheels.
  2. To connect or link systems, devices, or processes so that they work together or depend on each other.
    • The software interlock the payment and shipping processes automatically.
    • The two companies interlock their supply chains for better efficiency.
    • The security system interlock with the alarm to prevent unauthorized access.
noun
  1. A device or mechanism that connects parts so they work together or prevent unwanted operation.
    • The safety interlock on the machine stops it if the door is open.
    • The factory installed an interlock to prevent the conveyor belt from running backward.
    • The interlock on the car's ignition requires the brake to be pressed.
  2. A close connection or linking of parts or systems.
    • The interlock of the train tracks ensures smooth switching between lines.
    • The interlock of the bricks gives the wall extra strength.
    • There is a strong interlock between the two departments' schedules.