a. [ L. monumentalis: cf. F. monumental. ] 1. Of, pertaining to, or suitable for, a monument; as, a monumental inscription. [ 1913 Webster ]
2. Serving as a monument; memorial; preserving memory. “Of pine, or monumental oak.” Milton. [ 1913 Webster ]
A work outlasting monumental brass. Pope. [ 1913 Webster ]
3. Of lasting significance; as, a monumental work of literature; a monumental accomplishment. [ PJC ]
4. Exceptionally large in quantity, quality, or degree; as, a monumental amount of work to be done [ PJC ]
adv. 1. By way of memorial. [ 1913 Webster ]
2. By means of monuments. [ 1913 Webster ]