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.

Long-end Treasury yields declined more than short-end yields, causing the curve to flatten.

From The Wall Street Journal • Apr. 15, 2026

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

From MarketWatch • Mar. 12, 2026

But she believes accent stereotypes can flatten a very rich linguistic landscape such as the one in Wales.

From BBC • Mar. 4, 2026

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

From Salon • Feb. 26, 2026

The sound seemed to rumble through the hills and flatten out over the valley.

From "Fallen Angels" by Walter Dean Myers