Nefarious is most often used for someone or something that is flagrantly wicked or corrupt—it’s more applicable to the mustache-twirling supervillain than the morally gray antihero. In other words, there’s …

NEFARIOUS definition: extremely wicked or villainous; iniquitous. See examples of nefarious used in a sentence.

Whether it's because of negative traits or nefarious intent, the following are five types of "mentors" an entrepreneur is better off without. Not all big data is bad, but it can be used for nefarious purposes. It …

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

Sep 5, 2025 · nefarious (comparative more nefarious, superlative most nefarious) Aliens have a nefarious connotation in many science fiction books.

nefarious, adj. meanings, etymology, pronunciation and more in the Oxford English Dictionary

If you describe an activity as nefarious, you mean that it is wicked and immoral.

nefarious (nɪˈfɛərɪəs) adj evil; wicked; sinful [C17: from Latin nefārius, from nefās unlawful deed, from nē not + fās divine law]

Britannica Dictionary definition of NEFARIOUS [more nefarious; most nefarious] formal : evil or immoral nefarious criminal activities a nefarious scheme to cheat people out of their money

If something is nefarious, it is criminal, evil, malicious and wicked. Thinking of superheroes can help you remember the meaning of the word, but it is often used in much less exciting circumstances.