1. Evade or escape from a pursuer
   "I couldn't shake off the car that was following me";
   - shake, throw off
    
2. Rid oneself of something unwanted by forceful or determined action
   "I can't shake off the feeling something's wrong";
   - shake, throw off, cast off, shed
    
3. Recover from or resist the effects of something negative
   "It took him days to shake off the flu"

Derived forms: shaken off, shakes off, shook off, shaking off

Type of: break loose, escape, get away