Definify.com
Webster 1913 Edition
Monument
Mon′u-ment
,Noun.
 1. 
Something which stands, or remains, to keep in remembrance what is past; a memorial. 
Of ancient British art
A pleasing
A pleasing
monument
. Philips.
Our bruised arms hung up for 
monuments
. Shakespeare
2. 
A building, pillar, stone, or the like, erected to preserve the remembrance of a person, event, action, etc.; 
as, the Washington 
. Also, a tomb, with memorial inscriptions. monument
; the Bunker Hill monument
On your family’s old 
Hang mournful epitaphs, and do all rites
That appertain unto a burial.
monument
Hang mournful epitaphs, and do all rites
That appertain unto a burial.
Shakespeare
3. 
A stone or other permanent object, serving to indicate a limit or to mark a boundary. 
4. 
A saying, deed, or example, worthy of record. 
Acts and 
Monuments 
of these latter and perilous days. Foxe.
Syn. – Memorial; remembrance; tomb; cenotaph. 
Webster 1828 Edition
Monument
MON'UMENT
,Noun.
 1.
  Any thing by which the memory of a person or an event is preserved or perpetuated; a building, stone or other thing placed or erected to remind men of the person who raised it, or of a person deceased, or of any remarkable event; as a mausoleum, a pillar, a pyramid, a triumphal arch, a tombstone and the like.  A pillar of 200 feet in highth, composed of Portland stone, was erected in London as a monument to preserve the memory of the great conflagration in 1666.  A monument is erected on Bunker Hill to commemorate the battle of June 17, 1775.2.
  A stone or a heap of stones or other durable thing, intended to mark the bounds of states, towns or distinct possessions, and preserve the memory of divisional lines.3.
  A thing that reminds or gives notice.