A cylinder
It could be a prism, but need not be. A regular dodecahedron, for example, is not a prism but has parallel and congruent pentagonal bases. You can also have any antiprism (see link).
a rectangular prism yeah
A prism.
Prisms.Prisms.Prisms.Prisms.
Both a cylinder and a prism can have parallel and congruent bases.
An upright pentagonal prism has two congruent parallel bases and 15 edges.
cylinder
A cylinder
It could be a prism, but need not be. A regular dodecahedron, for example, is not a prism but has parallel and congruent pentagonal bases. You can also have any antiprism (see link).
Prism!
The given description fits that of a cylinder
a rectangular prism yeah
A prism.
Prisms.Prisms.Prisms.Prisms.
A cylinder would fit such a description of it.
Sounds like a rectangular solid to me, such as an elongated box.