The AI-powered English dictionary
comparative more monumental, superlative most monumental
In the manner of a monument. examples
Large, grand and imposing. examples
Taking a great amount of time and effort to complete. quotations examples
Creating a complete map of the human connectome would therefore be a monumental milestone but not the end of the journey to understanding how our brains work.
2012 March-April, Terrence J. Sejnowski, “Well-connected Brains”, in American Scientist, volume 100, number 2, archived from the original on 27 April 2017, page 171
(archaeology) Relating to monuments.