1. (noun) a horse used for plowing and hauling and other heavy labor

• dobbin
• farm horse
• draft horse
• draught horse
• dray horse
• packhorse
• plough horse
• plow horse

1. (noun) machine that performs dependably under heavy use

• machine

2. (noun) a horse used for plowing and hauling and other heavy labor

• equus caballus
• horse