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
a mark showing the boundary of a piece of land
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"
the position of a prominent or well-known object in a particular landscape; "the church steeple provided a convenient landmark"
having or expressing dignity; especially formality or stateliness in bearing or appearance; "her dignified demeanor"; "the director of the school was a dignified white-haired gentleman"
a feature (or the order or arrangement of features) of anything having a complex structure; "the contours of the melody"; "it defines a major contour of this administration"
a line drawn on a map connecting points of equal height