landmark Meaning, Definition & Usage

  1. noun the position of a prominent or well-known object in a particular landscape
    • the church steeple provided a convenient landmark
  2. noun an event marking a unique or important historical change of course or one on which important developments depend
    turning point; watershed.
    • the agreement was a watershed in the history of both nations
  3. noun a mark showing the boundary of a piece of land
  4. 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

WordNet

Land"mark` noun
Etymology
AS. landmearc. See Land, and Mark a sign.
Definitions
  1. A mark to designate the boundary of land; any , mark or fixed object (as a marked tree, a stone, a ditch, or a heap of stones) by which the limits of a farm, a town, or other portion of territory may be known and preserved.
  2. Any conspicuous object on land that serves as a guide; some prominent object, as a hill or steeple.

Webster 1913