Flatline Definition
flătlīn
flatlined, flatlines, flatlining
verb
To show a horizontal line on a monitor indicating no electrical activity in an electrocardiogram or an electroencephalogram.
American Heritage
To cease to live, flourish, or succeed; die literally or figuratively.
Webster's New World
To die.
American Heritage Medicine
To be in an unchanging condition.
Participation in civic activities has flatlined in recent years.
American Heritage
(intransitive) (of the heart) To stop beating.
Wiktionary
adjective
Being or relating to an electrocardiogram or an electroencephalogram that demonstrates no electrical activity.
American Heritage
noun
An unchanging state, as indicated in a graph of a variable over time.
Wiktionary
Asystole; the absence of heart contractions or brain waves.
Wiktionary
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