0 past simple and past participle of flatten
2 to become level and thinner or to cause something to become level and thinner:
He was immediately flattened by a single punch to the head.
The whole area was flattened in the bombing raid - not a building was left standing.
After a few hundred yards, you come to an area where the ground flattens out.
That tent is not secure, you know. The first gust of wind will flatten it.
A fight broke out and we had to grab Kevin to stop him flattening the other guy.
Picks were generally flattened on one side and were used in weaving to lift the warp to create intricate patterns.
This should be seen as a shorthand for a 'flattened' type that satisfies the restriction that union types cannot be nested.
The ventral surface is flattened, the dorsal arched and angled to the ventral, the anterior and posterior ends being rounded.
