1. of or relating to Pluto, the Roman god of the underworld; infernal or hellish
Usage: often capitalized when referring to the deity; literary or formal
2. of or relating to Pluto, the dwarf planet
Usage: modern usage; astronomy

Examples

• The poet described the underworld in plutonian terms, filled with darkness and despair.
• Ancient Romans feared the plutonian depths beneath the earth.
• Scientists studied plutonian geology after the New Horizons spacecraft flew by.
• The novel's plutonian atmosphere made readers feel trapped and uneasy.
• Plutonian mythology influenced many classical works of literature.