1.an inhabitant of hell;
his roar made the infernals quake
2.characteristic of or resembling hell;
infernal heat and noise
3.extremely evil or cruel; expressive of cruelty or befitting hell;
something demonic in him--something that could be cruel
4.expletives used informally as intensifiers;
he's a blasted idiot
5.relating to or inhabiting hell;
his infernal majesty
6.being of a lower world of the dead;
infernal regions