Both Uses

monopoly
in
Utopia, by Thomas More
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But, suppose the sheep should increase ever so much, their price is not likely to fall; since, though they cannot be called a monopoly, because they are not engrossed by one person, yet they are in so few hands, and these are so rich, that, as they are not pressed to sell them sooner than they have a mind to it, so they never do it till they have raised the price as high as possible.†
*
Banish these plagues, and give orders that those who have dispeopled so much soil may either rebuild the villages they have pulled down or let out their grounds to such as will do it; restrain those engrossings of the rich, that are as bad almost as monopolies; leave fewer occasions to idleness; let agriculture be set up again, and the manufacture of the wool be regulated, that so there may be work found for those companies of idle people whom want forces to be thieves, or who now, being idle vagabonds or useless servants, will certainly grow thieves at last.†

Definitions:

(1) (monopoly)
complete control over a product, service, or resource -- usually by a single person, company, or group
(2) (meaning too rare to warrant focus)