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Verb: flatten  fla-t(u)n
  1. Make flat or flatter
    "flatten your stomach with these exercises";
    - pancake
  2. Become flat or flatter
    "The landscape flattened";
    - flatten out, pancake
  3. (music) lower the pitch of (musical notes)
    - drop

Derived forms: flattened, flattens, flattening

Type of: alter, change, change form, change shape, deform, form, modify, shape

Antonym: sharpen

Encyclopedia: Flatten, Moselle