Design of the firearm
Single Action
Revolvers are not lever action firearms. Sorry- can you rephrase your question? Lever action firearms are most often rifles, rarely shotguns. A very few lever action pistols were made, but not revolvers.
It is the action performed by the object.
No, "defines" is not a common noun. It is a verb that describes the action of giving a precise meaning to something.
No.
The firearms statues do not define possession. The term has been defined by case law, and ordinary meaning of the word.
$100-$150
Arthur Pirkle has written: 'Winchester Lever Action Repeating Firearms' -- subject(s): Winchester rifle 'Winchester Lever Action Repeating Firearms, Vol. 3, The Models of 1894 and 1895 (Tourism Dynamics)'
no indication of such action, but possible.
Many types. First, muzzle loaders do not use cartridge casings. Only autoloading firearms automatically eject a fired casing. Revolvers, and lever action, bolt action, and pump action firearms require a specific action by the shooter to eject a fired casing, as do single shot and double barreled shotguns.
There are more than two basic types. There are revolvers, semi autos, breach action, bolt action, etc.
South Dakota defines legal firearms in terms of muzzle energy, not caliber. See the link below.