1. Anything by which the memory of a person or an event is preserved or perpetuated. A tomb where a dead body has been deposited. 2. In real property law and surveying, monuments are visible marks or indications left on natural or other objects indicating the lines and boundaries of a survey. In this sense the term includes not only posts, pillars, stone markers, cairns, and the like, but also fixed natural objects, blazed trees, and even a watercourse. Monuments, which we call “records,” are the vestiges of truth and antiquity.