What is the meaning of Hogshead?

A cask of a certain size; its volume used as a measure of capacity for liquids, containing 63 wine gallons, or about 52+2 imperial gallons (a half pipe).

A large barrel or cask of indefinite contents, especially one containing from 100 to 140 gallons.

hogshead (an English measure of liquids)

Source: wiktionary.org