landmark

Landmark has 2 syllables: land · mark.

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

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

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