landmark

noun

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

   noun.location

   Examples

   The church steeple provided a convenient landmark.

   Source: WordNet 3.0

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

   noun.event

   Synonyms turning point watershed

   Source: WordNet 3.0

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

   noun.communication

   Source: WordNet 3.0

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

   noun.body

   Source: WordNet 3.0

5. 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.

   noun

   Source: webster1913