1. To come, usually in answer to an invitation or summons
2. To produce quickly or regularly, usually with machinery.
3. To prove to be in the result or end; SYN. come out.
4. To prove to be in the result or end
5. To turn outward; SYN. splay, spread out.

When people, companies, factories, workshops, and so on, turn out something, they manufacture it or produce it.