Flatline (verb)

To stop showing any signs of life or activity; to become unresponsive, or to show a flat line on a monitor indicating a lack of vital signs.

Origin:

Flatline is derived from the word flatline, which refers to a flat line on a graph or a monitor, indicating a lack of movement or activity.

Examples:

1. The patient's heart rate began to flatline during surgery.
2. The stock market flatlined during the recession.
3. The patient's brain activity flatlined and he fell into a coma.
4. The company's profits flatlined after the scandal broke.
5. The patient's vital signs flatlined and the doctors declared him dead.