Sure. To me, ~~capitalism is any system that supports ownership of any property -- oil rigs, land, factories, assembly lines, burger machines, copyrights and patents, mines, farms, etc -- that is used to collect the products of another person's labor. (For example, when the oil rig worker is payed a wage, but the oil rig owner owns the oil that was pumped, that's capitalism.)~~

EDIT: Wolfhound pointed out that my definition ought to specify who is allowed to to control this property. And that's true.

Capitalism is any system that permits all people (or non-person entities) with sufficient wealth to own property -- oil rigs, land, factories, assembly lines, burger machines, copyrights and patents, mines, farms, etc -- that is used to collect the products of another person's labor. (For example, when the oil rig worker is payed a wage, but the oil rig owner or oil rig corporation owns the oil that was pumped, that's capitalism.)

The property used in the above manner is called capital, or private property. The person using it is called a capitalist.

As for whether it is conducive to workers controlling what they produce, my answer is that -- by definition -- capitalism allows someone else to control what workers produce. It does not guarantee a worker any power over what they produce, and in the majority of cases (where a worker must pay rent, health insurance, food, etc and cannot afford to start their own business or buy their own equipment) it actually pressures workers into situations where they do not control what they produce.