Definition of nefast
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of nefast
Latin nefastus, from nefas crime, wrong
Seen and Heard
What made you want to look up nefast? Please tell us where you read or heard it (including the quote, if possible).