We found 11 dictionaries that define the word weakens:

General (9 matching dictionaries)

1. weakens: Merriam-Webster
2. weakens: Collins English Dictionary
3. weakens: Vocabulary.com
4. Weakens, weakens: Wordnik
5. weakens: Cambridge Advanced Learner's Dictionary
6. weakens: Wiktionary
7. weakens: Dictionary.com
8. weakens: Cambridge Essential American English Dictionary
9. weakens: TheFreeDictionary.com

Business (1 matching dictionary)

10. weakens: Legal dictionary

Slang (1 matching dictionary)

11. weakens: Urban Dictionary

(Note: See weaken as well.)

Definitions from Wiktionary (weaken) ▸ verb:  (transitive) To make weaker or less strong. ▸ verb:  (intransitive) To become weaker or less strong. ▸ Also see weaken Opposite: strengthens Types: debilitates, enervates, impairs, saps, more... ▸ Words similar to weakens ▸ Usage examples for weakens ▸ Idioms related to weakens ▸ Wikipedia articles (New!) ▸ Words that often appear near weakens ▸ Rhymes of weakens ▸ Invented words related to weakens