The meaning of INFERNAL is of or relating to a nether world of the dead. How to use infernal in a sentence.

Serious and unpleasant (Definition of infernal from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

INFERNAL definition: hellish; fiendish; diabolical. See examples of infernal used in a sentence.

3 meanings: 1. of or relating to an underworld of the dead 2. deserving hell or befitting its occupants; diabolic; fiendish 3..... Click for more definitions.

Dec 24, 2025 · infernal (comparative more infernal, superlative most infernal) Of or relating to hell, or the world of the dead; hellish. (by extension) Of or relating to a fire or inferno. Stygian, …

1. hellish; fiendish; diabolical: an infernal plot. 2. extremely troublesome, annoying, etc.; outrageous: an infernal nuisance. 3. of, inhabiting, or befitting hell or the underworld.

Definition of infernal adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

There are 11 meanings listed in OED's entry for the word infernal, three of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

WordReference Random House Learner's Dictionary of American English © 2025 in•fer•nal /ɪnˈfɜrnəl/ adj. fiendish; diabolical: an infernal plot. very troublesome; outrageous: an infernal …

Of or relating to a lower world of the dead. b. Of or relating to hell: infernal punishments; infernal powers. 2. Fiendish; diabolical: infernal instruments of war. 3. Abominable; awful: the infernal …