Definition of flatten in English:


Line breaks: flat|ten
Pronunciation: /ˈflat(ə)n


  • 1Make or become flat or flatter: [with object]: her hair had been flattened by the storm [no object]: after Kendal, the countryside begins to flatten out
    More example sentences
    • Secondly, the mixture is then flattened out in the blending machine, and then it is flattened further in an extruder machine.
    • The heavy boots he wore had long ago flattened and grass he walked on, making a perfectly straight path where he had paced for the past few hours.
    • She quickly brushed, combed, and flattened her hair.
    make/become flat, make/become even, make/become smooth, smooth (out/off), level (out/off), even out; iron, steamrollercompress, press down, crush, squash, compact; trample, tread, tramp, wear
  • 1.1 [with object and adverbial of place] Press (oneself or one’s body) against a surface: Guy flattened himself against the wall
    More example sentences
    • A group of children noisily pushed through the crowd, so Jag flattened himself against the wall to keep from getting squashed.
    • He has flattened himself violently against the wall, his knees bent in towards it, body shaking.
    • She flattened herself against the treetrunk and waited.
  • 3 [with object] Music Lower (a note) in pitch by a semitone.

Phrasal verbs

flatten out

  • 1(Of an increasing quantity or rate) show a less marked rise; slow down: over the last two years our sales increase has flattened out
    More example sentences
    • Despite an ongoing economic boom, Portland's housing cost increases flattened out after 1995, and now roughly match the rate of inflation.
    • On the other hand, the survey report will point out that the recent fall in unemployment is slowing, effectively flattening out over the past three months.
    • The long ‘plateau’ period where this rise in prosecutions flattened out is more difficult to explain.
  • 2Make an aircraft fly horizontally after a dive or climb: he flattened out and made a fine three-point landing
    More example sentences
    • People out fishing reported seeing the aircraft flying straight and level, then entering a spiral dive before flattening out momentarily.
    • The Ju 88 went into a steep, jinking dive with the rear gunner firing at the other members of his Section who all attacked, until the Ju 88 flattened out and crash-landed at high speed.




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