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

Enrollment is declining across the board in traditional public schools as the national birthrate continues to fall, charter school enrollment remains robust, private school voucher use increases and the number of immigrant students has flatlined. — Austin Horn july 3, Miami Herald, 3 July 2026

Last year, the stock flatlined despite big data center order growth. — Morgan Chittum, CNBC, 1 July 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