weapons of mass destruction Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. nuclear or chemical or biological weapons that can cause indiscriminate death or injury on a large scale Example Sentence They want to keep the weapons of mass destruction away from the terrorists. Synonyms WMD; powerful military weaponry; very powerful weapon Antonyms peace Hear It! Say It! Write It! weapons of mass destruction Switch to cursive Start Share with your friends: