The meaning of the phrase “well-regulated” in the 2nd amendment

From: Brian T. Halonen <halonen@csd.uwm.edu>

The following are taken from the Oxford English Dictionary, and bracket in time the writing of the 2nd amendment:

1709: “If a liberal Education has formed in us well-regulated Appetites and worthy Inclinations.”

1714: “The practice of all well-regulated courts of justice in the world.”

1812: “The equation of time … is the adjustment of the difference of time as shown by a well-regulated clock and a true sun dial.”

1848: “A remissness for which I am sure every well-regulated person will blame the Mayor.”

1862: “It appeared to her well-regulated mind, like a clandestine proceeding.”