The meaning of FLATTEN is to make flat. How to use flatten in a sentence.

FLATTENED definition: 1. past simple and past participle of flatten 2. to become level or cause something to become…. Learn more.

flatten something These exercises will help to flatten your stomach. He flattened his hair down with gel. The bird is recognizable by its flattened beak. Roll the dough into balls and flatten …

Jan 7, 2026 · flattened Add to list Definitions of flattened adjective having been flattened synonyms: planate planar, two-dimensional involving two dimensions

1 day ago · flatten (third-person singular simple present flattens, present participle flattening, simple past and past participle flattened) (transitive) To make something flat or flatter.

The dough flattened smoothly/easily. The land flattens (out) as you approach the coast.

1. To make flat or flatter. 2. To knock down; lay low: The boxer was flattened with one punch.

If you flatten something or if it flattens, it becomes flat or flatter. He carefully flattened the wrappers and put them between the leaves of his book.

to (cause to) become flat: [~ (+ out) + object] Flatten (out) the pizza dough with your hands. [~ (+ out)] They flattened (out) against the wall and strained to see who was coming.

FLATTEN definition: to make flat. See examples of flatten used in a sentence.