Difference between object and mesh

I am reading the Materials section of the Blender Manual on this page: http://wiki.blender.org/index.php/Manual/Material_Options.
Under “Datablock Links”, it discusses the difference between linking a material to a mesh and linking a material to an object.
What I don’t understand is: what’s the difference between an object and a mesh?

In blender, there is a hierarchical structure.
A mesh is only a volume or a surface defined by vertices, edges and faces.
An object is more complex : it includes the mesh (the shape of the object), the material (color, specularity, emit factor, etc…) and the texture applied to the material.
Two objects can share the same mesh. Each object can be resized in object mode as an individual object, but modifying one of the two meshes in edit mode changes also the shape of the other object because they use the same mesh (shape).
When you duplicate an object using the Linked duplication (Alt D), the new object created will share the mesh with the original one.
I hope that this is understandable.

Thanx, Phillippe. That helped a lot. I link duplicated an object, and that helped me understand. I think that being able to have two objects share the same mesh will prove to be useful someday.:yes: