Definition of flatten
flattened;
flattening
play
\ˈflat-niŋ, ˈfla-tə-\
transitive verb
:to make flat: such as
a
:to make level or smooth
b
:to knock down;
also
:to defeat decisively
c
:to make dull or uninspired
—often used with out
d
:to make lusterless
- flatten paint
e
:to stabilize especially at a lower level
intransitive verb
:to become flat or flatter: such as
a
:to become dull or spiritless
b
:to extend in or into a flat position or form
c
:to become uniform or stabilized often at a new lower level
—usually used with out
