mon·u·ment / ˈmänyəmənt/ • n. a statue, building, or other structure erected to commemorate a famous or notable person or event. ∎  a statue or other structure placed by or over a grave in memory of the dead. ∎  a building, structure, or site that is of historical importance or interest: the amphitheater is one of the many Greek monuments in Sicily. ∎ fig. an outstanding, enduring, and memorable example of something: recordings that are a monument to the art of playing the piano. ∎  a marker, typically of concrete or stone, placed at the boundary of a piece of property.ORIGIN: Middle English (denoting a burial place): via French from Latin monumentum, from monere ‘remind.’

monument the word monument is recorded from Middle English, and originally denoted a burial place rather than the statue or building over it or commemorating a person or event; the word comes via French from Latin monumentum, from monere ‘remind’.
The Monument is a Doric column 202 feet in height, built in the City of London (1671–7) according to the design of Sir Christopher Wren, to commemorate the great fire of London of 1666, which originated in a house 202 feet from the site of the column.

monument † place of burial XIII; † written document, piece of evidence XV; commemorative object or structure XVI. Early forms also † mony-, † moniment — (O)F. monument, † moniment — L. monumentum, monimentum, f. monēre remind; see MONITION, -MENT.
Hence monumental XVII.

MONUMENT

Anything by which the memory of a person, thing, idea, art, science or event is preserved or perpetuated. A tomb where a dead body has been deposited.

Inreal-propertylaw and surveying, visible marks or indications left on natural or other objects indicating the lines and boundaries of a survey. Any physical object on the ground that helps to establish the location of a boundary line called for; it may be either natural (e.g., trees, rivers, and other land features) or artificial (e.g., fences, stones, stakes, or the like placed by human hands).

monument.
1. Building or memorial intended to perpetuate the memory of an event or an individual, such as a public memorial or funerary monument.

2. Structure considered to be an object of historic or architectural interest.