Land"mark` (?), n. [AS. landmearc. See Land, and Mark a sign.]
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.
Any conspicuous object on land that serves as a guide; some prominent object, as a hill or steeple.
Landmarks of history, important events by which eras or conditions are determined.
© Webster 1913.