monumental

adjectives

relating or belonging to or serving as a monument
"the use of the arch in monumental architecture"; "monumental sculptures"
is derived from
is derived from
is derived from
pertains to
of outstanding significance
"Einstein's monumental contributions to physics"
is similar to
important in effect or meaning
"a significant change in tax laws"; "a significant change in the Constitution"; "a significant contribution"; "significant details"; "statistically significant"
imposing in size or bulk or solidity
"massive oak doors"; "Moore's massive sculptures"; "the monolithic proportions of Stalinist architecture"; "a monumental scale"