Meaning & Definition of Landmark in English

1. The position of a prominent or well-known object in a particular landscape

• "The church steeple provided a convenient landmark"

2. An event marking a unique or important historical change of course or one on which important developments depend

• "The agreement was a watershed in the history of both nations"

3. A mark showing the boundary of a piece of land

4. 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