1. A forcible tearing or surgical separation of one body part from another
   "The accident resulted in the avulsion of a tooth"
    
2. An abrupt change in the course of a stream that forms the boundary between two parcels of land resulting in the loss of part of the land of one landowner and a consequent increase in the land of another
   "The avulsion caused by the flood significantly altered property boundaries along the river"

Derived forms: avulsions

Type of: alteration, change, modification, separation

Encyclopedia: Avulsion