blinkingcode

noun
UK /ˈblɪŋkɪŋ kəʊd/
US /ˈblɪŋkɪŋ koʊd/

A blinking code is a secret message made of lights that turn on and off.

The robot sent a blinking code to tell us it was ready.


OTHER MEANINGS

2. A pattern of flashing lights used by a device to show an error or status.

The router showed a blinking code to warn us the internet was down.

3. A way of sending hidden information by turning a light on and off quickly.

The spy used a blinking code from the window to signal his friend.

4. A set of flashing lights on a machine that people learn to read like words.

The pilot understood the blinking code on the runway lights.