monumental

Of, resembling, or serving as a monument.

Impressively large, sturdy, and enduring.

Of outstanding significance.

Astounding.

Of, pertaining to, or connected with a monument or monuments: as, a monumental inscription.

Belonging to a tomb.

Serving as a monument or as material for a monument; memorial; preserving memory: as, a monumental pillar.

Having the character of a monument; resembling a monument.

Conspicuous and permanent; historically prominent; impressive.

Conspicuous as a monument; notable; excessive; amazing: as, monumental impudence.