v.1. To expand the surface area of something, as a metal, by striking it: The artist pounded out the metal plate until it was flat. The blacksmith pounded the iron out.
2. To arrive at some agreement after much discussion, argument, or negotiation: The warring nations finally pounded out a treaty. The manager pounded a vacation schedule out that everyone liked.
3. To write something very quickly, especially using a keyboard: The author pounded out the last chapter of her novel in one day. The article was due in two hours, so I went to my computer and pounded it out.