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Definitions

flatten

[flat-n] / ˈflæt n /
VERB
level out
Synonyms
STRONGEST
crush raze smash straighten
STRONG
abrade compress debase deflate depress fell floor flush grade ground lay plane plaster prostrate roll smooth squash subdue trample
WEAK
beat down even out iron out knock down lay low mow down spread out
Antonyms
STRONGEST
lose
STRONG
blow up erect expand incite increase lift raise uncompress
WEAK
break elevate make uneven round

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Moderate relief is in sight this weekend, however, when forecasters predict the powerful high pressure system will start to flatten out, bringing a gradual drop in temperatures.

From Los Angeles Times • Mar. 19, 2026

“We’re just seeing this trend flatten out,” Berner said.

From MarketWatch • Mar. 12, 2026

But that doesn’t necessarily flatten one more than the other.

From Salon • Feb. 26, 2026

Dubois' representative Sam Jones predicted his fighter would "flatten" Ipswich's Wardley in quick time.

From BBC • Feb. 25, 2026

“Good work, everyone, I think we’ll flatten Slytherin,” he said bracingly, and the Chasers and Beaters left the changing room looking reasonably happy with themselves.

From "Harry Potter and the Half-Blood Prince" by J.K. Rowling