flattened; flattening ˈflat-niŋ How to pronounce flatten (audio)
ˈfla-tə-
Synonyms of flattennext

transitive verb

: to make flat
flatten the dough into a disk
The dog flattened its ears.
: such as
a
: to make level or smooth
flattened the papers
b
: to knock down
houses flattened by the tornado
also : to defeat decisively
got flattened in the first round of playoffs
c
: to make dull or uninspired
… small changes … that flatten a writer's style …John Gross
often used with out
In thus flattening out a complicated story, the book misses an opportunity …Tony Judt
d
: to make lusterless
flatten paint
e
: to stabilize especially at a lower level
a candidate promising to flatten interest rates

intransitive verb

: to become flat or flatter: such as
a
: to become dull or spiritless
b
: to extend in or into a flat position or form
c
: to become uniform or stabilized often at a new lower level
usually used with out
prices flattening out

Examples of flatten in a Sentence

Dozens of houses were flattened by the tornado. The boxer was flattened in the seventh round. The team got flattened in the first round of the play-offs. Prices are expected to flatten after the holiday shopping season.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Innovations in camera technology have made oners increasingly feasible, and there’s a risk of them getting flattened out, into just being generic action beats. Sarah Shachat, IndieWire, 21 Aug. 2026 Their purpose is not to flatten emotion or eliminate individuality, but to reduce symptoms that interfere with functioning and quality of life. Rachel Docekal, STAT, 21 Aug. 2026 To ensure quick, even cooking, consider flattening the chicken breasts. Sheena Chihak, Better Homes & Gardens, 20 Aug. 2026 Like a hiding fox squirrel, Kontras flattened himself against the trunk of the pine, moving only his head enough to peek glances at the grazing whitetail. Jeff Murray, Outdoor Life, 20 Aug. 2026 See All Example Sentences for flatten

Word History

First Known Use

1630, in the meaning defined at transitive sense

Time Traveler
The first known use of flatten was in 1630

Cite this Entry

“Flatten.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flatten. Accessed 25 Aug. 2026.

Kids Definition

flattened; flattening ˈflat-niŋ How to pronounce flatten (audio)
-ᵊn-iŋ
: to make or become flat

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