Synonyms of flatline

flatline

verb

ˈflat-ˌlīn 

as in to die

to stop living

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

Synonyms & Similar Words

• die
• fall
• perish
• succumb
• disappear
• demise
• end
• expire
• fade
• pass (on)
• exit
• buy it
• depart
• pass away
• step out
• check out
• go
• drop
• croak
• decease
• part
• snuff it
• kick in
• kick off
• peg out
• pop off
• give up the ghost
• fail
• kick the bucket
• conk (out)
• bite the dust
• dry up
• consume
• predecease

Antonyms & Near Antonyms

• live
• breathe
• come to
• revive
• exist
• be
• linger
• flourish
• thrive
• subsist
• prosper

Example Sentences

Recent Examples of flatline

After the disappointment of Die, My Love, another star vehicle from an auteur director that flatlined at theaters, the distributor needs a win. — Mia Galuppo, HollywoodReporter, 23 June 2026

For the past decade, the British economy has flatlined, while its population has become older, sicker, and no more productive. — Sam Knight, New Yorker, 22 June 2026

Specifically, the Xbox Series generation appears to be close to flatlining. — Paul Tassi, Forbes.com, 11 June 2026

Today, the mix has changed, and while many indoor malls are flatlining, the open air Cross County, with 14 million visitors a year, is leveling up. — Tony Aiello, CBS News, 29 May 2026