the front part or end of a tool, weapon, etc., with which the work is done or from which a missile is ejected, as opposed to the handle or butt:
the business end of a revolver; the business end of a screwdriver.
Punch, or the London Charivari, Vol. 102, June 11, 1892 Various
How Canada was Won F. S. Brereton
(informal) the part of a tool or weapon that does the work, as contrasted with the handle
English in business usage, especially the styles and forms of business correspondence. Historical Examples The ‘Fan Kwae’ at Canton Before Treaty Days 1825-1844 William C. Hunter
a postal envelope for standard-size business letters 8½ × 11 inches (20 × 28 cm), measuring about 4½ × 9 inches (11 × 23 cm).
the methods and technologies that gather, store, report, and analyze business data to help people make business decisions: business intelligence software; business intelligence tools. the data gathered by these methods: Our operations decisions are driven by business intelligence. Abbr.: BI. noun Usage Note