as in to die
to stop living
the patient was fading fast, and doctors expected him to flatline before the night was over
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Recent Examples of flatline
But after growth soared from late 2023 through last year, the business has flatlined, with some analysts saying that Dell has taken market share.
—
Ari Levy, CNBC, 4 Nov. 2025
The episode ends with Monty flatlining in the hospital as Cami and their daughters cry for him.
—Randall Colburn, Entertainment Weekly, 4 Nov. 2025
Stand on your seats and give it up for a genre that refused to flatline, even when the think pieces already had the casket picked out.
—Carl Lamarre, Billboard, 29 Oct. 2025
Chase Brown had completely flatlined as a fantasy commodity before Flacco’s arrival, and Tee Higgins was approaching a similar status.
—Andy Behrens, New York Times, 17 Oct. 2025
See All Example Sentences for flatline
Ari Levy, CNBC, 4 Nov. 2025
The episode ends with Monty flatlining in the hospital as Cami and their daughters cry for him.
—Randall Colburn, Entertainment Weekly, 4 Nov. 2025
Stand on your seats and give it up for a genre that refused to flatline, even when the think pieces already had the casket picked out.
—Carl Lamarre, Billboard, 29 Oct. 2025
Chase Brown had completely flatlined as a fantasy commodity before Flacco’s arrival, and Tee Higgins was approaching a similar status.
—Andy Behrens, New York Times, 17 Oct. 2025
See All Example Sentences for flatline
Recent Examples of Synonyms for flatline
Verb
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Vince Gill, the country star who joined the band after original member Glenn Frey died in 2016, shouldered most of the load caused by Walsh’s absence.—
Jim Harrington,
Mercury News,
25 Jan. 2026
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The co-worker said Pretti researched how to prevent veterans from dying from colon cancer.—
Jeff Winter,
CNN Money,
25 Jan. 2026
Verb
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The cold air is then expected to stay in place through the beginning of February, ensuring that whatever snow falls this weekend will stay on the ground for a while.—
Matthew Villafane,
CBS News,
25 Jan. 2026
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Only one other player has been ever elected by the writers with 1,500 or fewer hits — Roy Campanella (1,422) in 1969 — and that total falls far short of the average career hit mark for all Hall of Fame batters, which is 2,330.—
Mac Cerullo,
Boston Herald,
25 Jan. 2026
Cite this Entry
“Flatline.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/flatline. Accessed 25 Jan. 2026.
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