Bulk can refer to:
Industry
Bulk cargo
Bulk liquids
Bulk mail
Bulk material handling
Bulk pack, packaged bulk materials/products
Bulk purchasing
Baking
Bulk fermentation, the period after mixing when dough is left alone to ferment in bulk, meaning before division to final weights.
Physics
Bulk density
Bulk modulus
In brane cosmology and M-theory (see also the AdS/CFT correspondence), the bulk is 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
Mike Waters, known as Bulk, British professional wrestler with the UK Pitbulls
Fiction
Bulk and Skull, a pair of characters in the Power Rangers universe
Places
Bulk, Lancashire, area of Lancaster, England
Bülk Lighthouse, outside Kiel, Germany
