flatten out

US /ˈflæt.ən aʊt/
UK /ˈflæt.ən aʊt/
"flatten out" picture
1.

to become flat or level, or to make something flat or level

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The road started to flatten out after the steep climb.
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You need to flatten out the dough before baking.
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level outsmooth outeven outplaneiron out
2.

to stop increasing or decreasing and remain at a stable level

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The company's profits are expected to flatten out next quarter.
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After a rapid increase, the infection rate began to flatten out.
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stabilizelevel offplateaueven out
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flattenout-and-outoutingout ofoutfigure outtake out