1. An event marking a unique or important historical change of course or one on which important developments depend
   "the agreement was a landmark in the history of both nations";
   - turning point, watershed, cusp
    
2. The position of a prominent or well-known object in a particular landscape
   "the church steeple provided a convenient landmark"
    
3. A mark showing the boundary of a piece of land
   "The old oak tree served as a landmark between the two properties"
    
4. (surgery) an anatomical structure used as a point of origin in locating other anatomical structures (as in surgery) or as point from which measurements can be taken
   "The surgeon used the xiphoid process as a landmark to locate the liver"

Derived forms: landmarks

Type of: anatomical structure, bodily structure, body structure, complex body part, juncture, occasion, place, point of reference, position, reference, reference point, structure

Encyclopedia: Landmark, Manchester