We found 9 dictionaries that define the word mortal enemy:

General (9 matching dictionaries)

1. mortal enemy: Merriam-Webster
2. mortal enemy: Vocabulary.com
3. Mortal enemy, mortal enemy: Dictionary.com
4. mortal enemy: Rhymezone
5. mortal enemy: FreeDictionary.org
6. mortal enemy: Mnemonic Dictionary
7. mortal enemy: TheFreeDictionary.com

Definitions from WordNet (mortal enemy) ▸ noun:  an enemy who wants to kill you Opposite: ally, friend, comrade, confidant ▸ Words similar to mortal enemy ▸ Usage examples for mortal enemy ▸ Idioms related to mortal enemy ▸ Wikipedia articles (New!) ▸ Words that often appear near mortal enemy ▸ Rhymes of mortal enemy ▸ Invented words related to mortal enemy