n.
  - a dog of no definable type or breed.
 - offensive a person of mixed descent.
 
 
  Derivative
  
    - mongrelism n.
  - mongrelization
 or mongrelisation n.  - mongrelize
 or mongrelise v. 
   
  Etymology
  ME: of Gmc origin, appar. from a base meaning ‘mix’, and rel. to mingle and among.