Definitions
1.adjectiveOf or relating to Pluto, the Greek and Roman god of the underworld; demonic, infernal.
2.adjective(by extension) Of, relating to, or having characteristics associated with the underworld; dark, gloomy; mournful.
3.adjectivePertaining to the astrological influence of Pluto, formerly regarded as a planet.
4.adjectiveOf or relating to the dwarf planet Pluto.
5.adjective(by extension) Of or pertaining to rocks formed deep in the Earth's crust, rather than by volcanoes at the surface of the Earth.
6.adjective(by extension) Of, pertaining to, or supporting plutonism.
7.adjectiveContaining plutonium in a higher oxidation state.