flatten out

Definitions of flatten out
  1. verb
    become flat or flatter
    synonyms: flatten
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    types:
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    splat
    flatten on impact
    press
    place between two surfaces and apply weight or pressure
    iron, iron out, press
    press and smooth with a heated iron
    calender
    press between rollers or plates so as to smooth, glaze, or thin into sheets
    type of:
    change form, change shape, deform
    assume a different shape or form
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