noun . 1. magnitude in three dimensions: a ship of great bulk. 2. the greater part; main mass or body: The bulk of the debt was paid. 3. goods or cargo not in packages or boxes ...

noun . 1. Also called hyperphagia. Pathology. abnormally voracious appetite or unnaturally constant hunger. 2. Also called binge-purge syndrome, bulim·ia ner·vo·sa ...

An example of bulk is the overall size of a large football player.