From your reference, I think this supports the other meaning: > The verb "monopolise" refers to the process by which a company gains the ability to raise price

From your reference, I think this supports the other meaning: > The verb "monopolise" refers to the process by which a company gains the ability to raise prices or exclude competitors. As I see it, without that ability to exclude, it's not a monopoly. In a market without lock-in, or lock-out depending on your PoV, I can start selling widgets at any time and will do so whenever your profit margin gets too sweet. You're competing against me even if I'm not actively selling yet.