English

Definition of flatten out phrasal verb from the Oxford Advanced Learner's Dictionary

 

flatten out

 phrasal verb
phrasal verb
 
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Phrasal Verbs
  1. 1to gradually become completely flat The hills first rose steeply then flattened out towards the sea.
  2. 2to stop growing or going up Export growth has started to flatten out.
to make something completely flat
See the Oxford Advanced American Dictionary entry: flatten out