PON'DEROUS, adjective [Latin ponderosus.] 1. Very heavy; weighty; as a ponderous shield; a ponderous load. 2. Important; momentous; as a ponderous project. [This application of the word is unusual.] 3. Forcible; strongly impulsive; as a motion vehement or ponderous; a ponderous blow. Ponderous spar, heavy spar, or baryte.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI