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.

Fine Arts . having the quality of being larger than life; of heroic scale.

of or pertaining to a monument or monuments.

serving as a monument.

adjective

insignificant , trivial , unimportant , unimposing , unimpressive

adjective

awe-inspiring , awesome , classic , enduring , enormous , fantastic , gigantic , grand , great , historic , huge , immense , immortal , important , lasting , lofty , majestic , mammoth , massive , memorable , mighty , mortal , mountainous , outstanding , prodigious , significant , stupendous , towering , tremendous , unforgettable , vast , behemoth , brobdingnagian , bunyanesque , colossal , cyclopean , elephantine , gargantuan , gigantesque , herculean , heroic , jumbo , massy , mastodonic , monster , monstrous , pythonic , titanic , big , consequential , considerable , large , material , meaningful , substantial , astounding , epic , epochal , impressive