A serving vessel or container, typically circular in cross-section and typically higher than it is wide, with a relatively small mouth or spout, an ear handle and often a stopper or top.

The amount that a jug can hold.

Jail.

To stew in an earthenware jug etc.

“jugged hare”

To put into jail.

To utter a sound like "jug", as certain birds do, especially the nightingale.