Flatline meaning

flătlīn
To show a horizontal line on a monitor indicating no electrical activity in an electrocardiogram or an electroencephalogram.
verb
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(informal) To die.
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To be in an unchanging condition.

Participation in civic activities has flatlined in recent years.

verb
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Being or relating to an electrocardiogram or an electroencephalogram that demonstrates no electrical activity.
adjective
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To cease to live, flourish, or succeed; die literally or figuratively.
verb
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To show a horizontal line on the monitor of an electrocardiogram or an electroencephalogram, indicating no electrical activity.
verb
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(informal) To die.
verb
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Being or relating to an electrocardiogram or an electroencephalogram that indicates no electrical activity.
adjective
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A market that returns to where it opened, having neither a gain nor a loss. A chart of the market shows a line that looks flat. The term is used more frequently on financial television programs than in news articles or magazines.
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An unchanging state, as indicated in a graph of a variable over time.
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Asystole; the absence of heart contractions or brain waves.
noun
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(intransitive) (of the heart) To stop beating.
verb
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(intransitive) (by extension) To die.
verb
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To stay at the same level, without development; or, to fall.
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Origin of flatline

  • flat +"Ž line Refers to a continuous straight line (asystole) on an ECG (EKG) or EEG, indicating death.

    From Wiktionary