- (a.) To reduce to an even surface or one approaching evenness; to make flat; to level; to make plane.
- (a.) To throw down; to bring to the ground; to prostrate; hence, to depress; to deject; to dispirit.
- (v.i.) To become or grow flat, even, depressed dull, vapid, spiritless or depressed below pitch.
- (a.) To make vapid or insipid; to render stale.
- (a.) To lower the pitch of; to cause to sound less sharp; to let fall from the pitch.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). flatten. Retrieved September 20, 2026, from http://smartdefine.org/flatten/definitions/2008470 |
| Chicago | Webster's. 2011. "flatten" http://smartdefine.org/flatten/definitions/2008470 (accessed September 20, 2026). |
| Harvard | Webster's 2011, flatten, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/flatten/definitions/2008470>. |
| MLA | Webster's. "flatten" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/flatten/definitions/2008470> |