Meaning : Relating or belonging to or serving as a monument.
Example :
The use of the arch in monumental architecture.
Monumental sculptures.
Meaning : Of outstanding significance.
Example :
Einstein's monumental contributions to physics.
Meaning : Imposing in size or bulk or solidity.
Example :
Massive oak doors.
Moore's massive sculptures.
The monolithic proportions of Stalinist architecture.
A monumental scale.
Synonyms : massive, monolithic