flatten (verb)

make flat or flatter

"flatten a road"; "flatten your stomach with these exercises"

flatten, flatten out (verb)

become flat or flatter

"The landscape flattened"

flatten, drop (verb)

lower the pitch of (musical notes)

flatten (Verb)

To make something flat or flatter.

flatten (Verb)

To press one's body tightly against a surface, such as a wall or floor, especially in order to avoid being seen or harmed.

flatten (Verb)

To knock down or lay low.

flatten (Verb)

To become flat or flatter.

flatten (Verb)

To be knocked down or laid low.

flatten (Verb)

To lower by a semitone.