Definition of Flatline
Flatline
flat·line
Definition/Meaning
(verb)
to fail, used to describe the state of an undertaking or project;
e.g. No-one expected the film to flatline the way it did, since it was based on a successful book.
(verb)
to come up on an electronic monitor as having no brain waves or heartbeat and therefore to be dead;
e.g. He went into cardiac arrest and then flatlined.
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