Originally Posted by SCOTUS
Before addressing the verbs “keep” and “bear,” we interpret their object: “Arms.” The 18th-century meaning is no different from the meaning today. The 1773 edition of Samuel Johnson’s dictionary defined “arms” as “weapons of offence, or armour of defence.” 1 Dictionary of the English Language 107 (4th ed.) (hereinafter Johnson). Timothy Cunningham’s important 1771 legal dictionary defined “arms” as “any thing that a man wears for his defence, or takes into his hands, or useth in wrath to cast at or strike another.” 1 A New and Complete Law Dictionary (1771); see also N. Webster, American Dictionary of the English Language (1828) (reprinted 1989) (hereinafter Webster) (similar).
The term was applied, then as now, to weapons that were not specifically designed for military use and were not employed in a military capacity. For instance, Cunningham’s legal dictionary gave as an example of usage: “Servants and labourers shall use bows and arrows on Sundays, &c. and not bear other arms.” See also, e.g., An Act for the trial of Negroes, 1797 Del. Laws ch. XLIII, §6, p. 104, in 1 First Laws of the State of Delaware 102, 104 (J. Cushing ed. 1981 (pt. 1)); see generally State v. Duke, 42Tex. 455, 458 (1874) (citing decisions of state courts construing “arms”). Although one founding-era thesaurus limited “arms” (as opposed to “weapons”) to “instruments of offence generally made use of in war,” even that source stated that all firearms constituted “arms.” 1 J. Trusler, The Distinction Between Words Esteemed Synonymous in the English Language37 (1794) (emphasis added).
Some have made the argument, bordering on the frivolous, that only those arms in existence in the 18th century are protected by the Second Amendment . We do not interpret constitutional rights that way. Just as the First Amendment protects modern forms of communications, e.g., Reno v. American Civil Liberties Union, 521 U. S. 844, 849 (1997) , and the Fourth Amendment applies to modern forms of search, e.g., Kyllo v. United States, 533 U. S. 27, 35–36 (2001) , the Second Amendment extends, prima facie,to all instruments that constitute bearable arms, even those that were not in existence at the time of the founding.