Dictionary Definition

flatten

1 make flat or flatter; "flatten a road"; "flatten your stomach with these exercises"

2 become flat or flatter; "The landscape flattened" [syn: flatten out]

3 lower the pitch of (musical notes) [syn: drop] [ant: sharpen]

User Contributed Dictionary

To make something flat or flatter.

As there was a lot of damage, we chose the heavy roller to flatten the pitch.
Mary would flatten the dough before rolling it into pretzels.
To knock down or lay low.

The prize fighter quickly flattened his challenger.
To become flat or flatter.
To be knocked down or laid low.

to make something flat

to become flat

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