Main Entry: land·mark

Pronunciation: \-ˌmärk\

Function: noun

Date: before 12th century

1 : an object (as a stone or tree) that marks the boundary of land
2 a : a conspicuous object on land that marks a locality b : an anatomical structure used as a point of orientation in locating other structures
3 : an event or development that marks a turning point or a stage
4 : a structure (as a building) of unusual historical and usually aesthetic interest; especially : one that is officially designated and set aside for preservation