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Definition of Weapons-grade
1. Adjective. Of a quality adequate for use in weapons (especially in weapons of mass destruction). "Weapons-grade anthrax"
Similar to: Superior
2. Adjective. Extremely strong or concentrated or durable. "Weapons-grade salsa"
Definition of Weapons-grade
1. Adjective. (context: of a radioactive or other substance) of a purity suitable for the manufacture of weapons ¹
¹ Source: wiktionary.com