the definition of landmark
noun. The definition of a landmark is a building or an object that helps you identify a location or the boundary of a piece of land. An example of a landmark is the library that you turn after in your directions.Landmark is defined as an event that changed history.An example of landmark is a legal case that is very important. Landmark means a location that has historical importance. An example of a landmark is Gettysburg.andmark is defined as an event that changed history. An example of landmark is a legal case that is very important. Landmark means a location that has historical importance. An example of a landmark is Gettysburg.