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.
Lighting director Frédéric Dorieux has said that the team aims for light that is soft, even, and full without flattening the face. — Anna Cafolla, Vogue, 3 Oct. 2026 Even the actors’ bodies exhibit the bland greige produced by the high dynamic range of digital cameras and are flattened by the inconsistent lighting that comes from overuse of green screens. — Harmon Siegel, Artforum, 1 Oct. 2026 The findings land as companies continue to flatten their organizations. — Bilin Lin, Fortune, 1 Oct. 2026 The girls do their solos, and Ericka flattens Paulina like a tractor mowing down a patch of dandelions. — Sara Holdren, Vulture, 29 Sep. 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 5 Oct. 2026.

Kids Definition

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