Bulk can refer to: Industry Bulk cargo Bulk liquids Bulk mail Bulk material handling Bulk purchasing Physics Bulk density Bulk modulus In brane cosmology and M-theory, the bulk's a hypothetical higher dimensional space within which the eleven dimensions of our universe (the three dimensions we can see, plus time, plus the seven extra dimensions that we can't see but M-theory theorizes are all around us) may exist. People Bulk - British professional wrestler Fiction Bulk and S… (More on Bulk)