- A machine for creating bales, e.g., of hay or cotton.
- Farmer Jones is in straits because his baler is broken down and he's got three fields of hay ready to bale.
- A person who creates bales, either by operating or feeding such a machine, or by creating the bales by hand.
- Hank worked as a baler for Farmer Jones part time, to make ends meet.
From bale + -er.