1 : serving as or resembling a monument : massive monumental sculptures also : highly significant : outstanding a monumental painting that stunned the American public. 2 : of or relating to a monument modern monumental architecture. 3 : very great a monumental misunderstanding.

Why does monumental mean?

resembling a monument; massive or imposing. exceptionally great, as in quantity, quality, extent, or degree: a monumental work. of historical or enduring significance: a monumental victory.

What is an example of monumental?

The definition of monumental is something very large or important, or something that has lasting value. When it is very hard for you to exercise and you make a very ambitious and dedicated effort to getting ready to compete in a race, this is an example of a monumental effort. Impressively large, sturdy, and enduring.