flatten

verb

flat·​ten ˈfla-tᵊn How to pronounce flatten (audio)
flattened; flattening ˈflat-niŋ How to pronounce flatten (audio)
ˈfla-tə-

transitive verb

: to make flat: such as
a
: to make level or smooth
b
: to knock down
also : to defeat decisively
c
: to make dull or uninspired
often used with out
d
: to make lusterless
flatten paint
e
: to stabilize especially at a lower level

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
flattener
ˈflat-nər How to pronounce flatten (audio)
ˈfla-tə-
noun

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.
That means your voice, your rhythm, your particular way of saying something—these are at risk of being flattened. Vibhas Ratanjee, Forbes.com, 14 Apr. 2025 One house is basically flattened, another partially collapsed, and others damaged. Mitchell Willetts, Fort Worth Star-Telegram, 13 Apr. 2025 Bukele has kept the state of exception in place for more than three years, even though the constitution caps it at 60 days—and even though the murder rate plummeted within those first two months but has flattened since. Gisela Salim-Peyer, The Atlantic, 10 Apr. 2025 Torrential rainfall — which followed potent tornadoes earlier last week — has fueled flooding that has ravaged states in the central and southern U.S., shredding roofs, flattening homes and businesses, sending structures floating down rivers and leaving thousands without power. Nicole Fallert, USA Today, 7 Apr. 2025 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 20 Apr. 2025.

Kids Definition

flatten

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

More from Merriam-Webster on flatten

Last Updated: - Updated example sentences
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