A container for holding liquids that has a handle and a shaped opening at the top for pouring. (Cambridge Dictionary)
A cylindrical container with a handle and a lip, used for holding and pouring liquids. (Oxford Dictionaries)
A jug is a cylindrical container with a handle and is used for holding and pouring liquids. (Collins Dictionary)
A large deep container (as of glass, earthenware, or plastic) with a narrow mouth and a handle. (Merriam – Webster)
Jug meaning in Longman.
Jug meaning in Cambridge Dictionary.