flatline

verb flat·line \ ˈflat-ˌlīn \

Definition of flatline

intransitive verb
1 a : to register on an electronic monitor as having no brain waves or heartbeat
b : die
2 a : to be in a state of no progress or advancement
b : to come to an end

flatliner

noun

Examples of flatline in a Sentence

  1. the patient was fading fast, and doctors expected him to flatline before the night was over

Recent Examples of flatline from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'flatline.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of flatline

1980


Medical Dictionary

flatline

intransitive verb flat·line \ ˈflat-ˌlīn \

medical Definition of flatline

flatlined; flatlining
1 : to register on an electronic monitor as having no heartbeart or brain waves : to experience cessation of heart contractions or brain wave activity as indicated by a flat line on a electrocardiogram or electroencephalogram
  • I flatlined on the operating table, but Dr. Bunsom managed to revive me.
  • —Alison WrightYoga JournalMay/June 2005
  • He used to be ill quite a bit as a younger child, and his heart flatlined four times before he was 6.
  • —Ginnie GrahamTulsa World19 Dec. 2007
2 : 1die
  • But just because death is expected doesn't mean it's any less depressing when the patient finally flatlines.
  • —Phil TaylorSports Illustrated26 Jan. 2009

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