Flatten
Flatten (flat"t'n) , transitive verb
[From Flat, a.]
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.
(Music) To lower the pitch of; to cause to sound less sharp; to let fall from the pitch.
Collocations (2)
To flatten a sail (Nautical) , to set it more nearly fore-and-aft of the vessel.
Flattening oven , in glass making, a heated chamber in which split glass cylinders are flattened for window glass.
Flatten , intransitive verb
To become or grow flat, even, depressed, dull, vapid, spiritless, or depressed below pitch.