flatten Meaning, Definition & Usage

  1. verb make flat or flatter
    • flatten a road
    • flatten your stomach with these exercises
  2. verb become flat or flatter
    flatten out.
    • The landscape flattened
  3. verb lower the pitch of (musical notes)
    drop.

WordNet

Flat"ten transitive verb
Etymology
From Flat, a.
Wordforms
imperfect & past participle Flattened ; present participle & verbal noun Flattening
Definitions
  1. To reduce to an even surface or one approaching evenness; to make flat; to level; to make plane.
  2. To throw down; to bring to the ground; to prostrate; hence, to depress; to deject; to dispirit.
  3. To make vapid or insipid; to render stale.
  4. (Mus.) To lower the pitch of; to cause to sound less sharp; to let fall from the pitch.
Flat"ten intransitive verb
Definitions
  1. To become or grow flat, even, depressed dull, vapid, spiritless, or depressed below pitch.

Webster 1913