green-lightgadget
nounUK /ˈɡriːn laɪt ˈɡædʒɪt/
US /ˈɡriːn laɪt ˈɡædʒɪt/
A gadget that gives a green light to show it is working.
The green-lightgadget on my desk turned on when the power came back.
OTHER MEANINGS
2. A small tool that shows approval or permission with a green glow.
The green-lightgadget blinked to say the door was unlocked.
3. A toy device that lights up green when you press it.
My little brother loves his green-lightgadget and presses it all day.
4. A gadget used to signal that a machine is safe to start.
The worker checked the green-lightgadget before starting the machine.