You can lend someone your bicycle without giving them permission to sell it. The distinction seems ordinary because people recognize different rights over the same object: using it for an afternoon is not the same as deciding who owns it tomorrow.
Private ownership assigns recognized control over resources to people or private organizations. It can include rights to use something, exclude others, permit access, and transfer ownership. Those rights depend on the arrangement; ownership does not mean unlimited permission to do anything.
Who gets to decide?
An owner can make plans without renegotiating every use with everyone else. But that independence also means others may need permission to access something important. Owning a bicycle and owning the only available meeting space give someone very different influence over other people’s choices.
Markets let ownership change hands through exchange. Capitalism combines private ownership with investment and production for profit. Neither exhausts the idea: a gift also transfers ownership, and an owner may keep something for personal use.
The useful questions are concrete: which rights does the owner hold, what obligations accompany them, and how can others challenge their exercise? Different answers create different relationships around the same resource.