I pulled it straight out of the dictionary, where the word “Militia” is defined.
And I demonstrated, repeatedly, how that definition is flawed, and does not reflect how the word is used in either the constitution or legislation. Your definition specifically excludes certain individuals that the law (10 USC 246) specifically includes. You have provided no argument as to why 10 USC 246 - an act of Congress - should be rejected, and replaced by the opinion of Mr. Johnson, a private individual.
While you may have other routes forward, the only options I can see to further your argument are to adopt a definition that is not fundamentally incompatible with 10 USC 246, or you can demonstrate that this part of 10 USC is unconstitutional, and incompatible with the constitutional meaning.
Frankly, your best option here is to concede the point.