We found 9 dictionaries that define the word chemical weapons:

General (6 matching dictionaries)

1. chemical weapons: Collins English Dictionary
2. chemical weapons: Vocabulary.com
3. chemical-weapons: Wordnik
4. chemical weapons: Cambridge Advanced Learner's Dictionary
5. chemical weapons: Wiktionary
6. Chemical weapons: Wikipedia, the Free Encyclopedia

Computing (1 matching dictionary)

7. Chemical weapons: Encyclopedia

Medicine (1 matching dictionary)

8. Chemical weapons: Medical dictionary

Miscellaneous (1 matching dictionary)

9. Glossary of Terrorism Terms (No longer online)

(Note: See chemical_weapon as well.)

Definitions from Wiktionary (chemical weapon) ▸ noun:  A noxious substance contained in some form of delivery system such as a shell or missile. ▸ Also see chemical_weapon Phrases: Chemical Weapons Convention, Chemical weapons in World War I, Organisation for the Prohibition of Chemical Weapons, Use of chemical weapons in the Syrian civil war, Iraqi chemical weapons program, more... ▸ Words similar to chemical weapons ▸ Usage examples for chemical weapons ▸ Idioms related to chemical weapons ▸ Wikipedia articles (New!) ▸ Words that often appear near chemical weapons ▸ Rhymes of chemical weapons ▸ Invented words related to chemical weapons