A Red Herring.
Monopoly :A market structure in which there is a single seller.
By this definition a patent-holder could be said to constitute a monopoly. But, the operative phrase in the definitions you supplied is market structure. Microsoft isn't a market structure and neither is a patent-holder. Since only the government has the power to forcibly structure the market only the government can create a monopoly. If the government throws up barriers which obstruct competition from offering alternatives then a monopoly exists. Otherwise it doesn't.
There are a dozen different definitions of "monopoly" all over the Internet. Each of them contain suttle differences. I'll stand by Noah Webster's definition.
If you wish to discuss Economics, I would suggest enrolling in an entry-level course at your closest community college or junior college. You will benefit by learning both fundamental principles as well as proper use of terminology.
Argumentum ad Hominem.
Citing some antiquated lay definition out of Noah Webster's 1828 dictionary is ludicrous.
Argumentum ad Novitam.
Res ipsa loquitur.