1. Hybrid offspring of a male donkey and a female horse; usually sterile
   "The mule proved to be a reliable pack animal for the mountainous terrain"
    
2. A slipper that has no fitting around the heel
   "She slipped on her comfortable mules before heading to the kitchen";
   - scuff
    
3. A test vehicle fitted with prototype components
   "The automotive engineers used a mule to test the new suspension system"
    
4. A small vehicle or locomotive
   "The mining company used mules to transport ore through narrow tunnels"
    
5. [informal] A person paid to smuggle drugs
   "The cartel used mules to transport drugs across the border"
    
6. A stubborn person
   "He's such a mule when it comes to changing his mind"

Sounds like: mucus, mucmule

Derived forms: mules

Type of: carpet slipper, equid, equine, slipper

Part of: Equus, genus Equus

Encyclopedia: Mule, Norway