1. (noun) 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

• alteration
• change
• modification

2. (noun) a forcible tearing or surgical separation of one body part from another

• separation

1. (noun) a forcible tearing or surgical separation of one body part from another

• avulse