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
Unlike those of many other developed countries, its emissions are expected to flatline instead of decline.
—
Justin Worland, Time, 18 Dec. 2025
Because of high home prices, historically elevated mortgage rates and other higher housing costs, including property taxes and homeowner insurance premiums, Gen Z and millennial homeownership rates flatlined last year.
—Giulia Carbonaro, MSNBC Newsweek, 3 Dec. 2025
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
See All Example Sentences for flatline
Justin Worland, Time, 18 Dec. 2025
Because of high home prices, historically elevated mortgage rates and other higher housing costs, including property taxes and homeowner insurance premiums, Gen Z and millennial homeownership rates flatlined last year.
—Giulia Carbonaro, MSNBC Newsweek, 3 Dec. 2025
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
See All Example Sentences for flatline
Recent Examples of Synonyms for flatline
Verb
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Brad Arnold, the 47-year-old cofounder and lead singer of the Mississippi rock band 3 Doors Down, died Saturday, nine months after revealing a diagnosis of kidney cancer.—
Los Angeles Times,
Los Angeles Times,
8 Feb. 2026
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The company's founder and namesake, Walt Disney, had died in December 1966, but his presence still loomed large over a studio that was seemingly second-guessing its every move.—
Richard Edwards,
Space.com,
8 Feb. 2026
Verb
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Council members had long pledged to quell gang violence and improve life for Haiti but fell overwhelmingly short.—
EVENS SANON,
Arkansas Online,
8 Feb. 2026
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Short video and artificial intelligence video generation company Kuaishou fell by 11% during the same time period.—
Evelyn Cheng,
CNBC,
8 Feb. 2026
Cite this Entry
“Flatline.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/flatline. Accessed 14 Feb. 2026.
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