Definitions of landmark:

  • noun:   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
  • noun:   a mark showing the boundary of a piece of land
  • noun:   an event marking a unique or important historical change of course or one on which important developments depend
  • noun:   the position of a prominent or well-known object in a particular landscape
    Example: "The church steeple provided a convenient landmark"
  • name:  A surname (very rare: popularity rank in the U.S.: #82339)