What is meant by "garden" ?

A little piece of land around a home where vegetables and potatoes grow ?

Is it an idyllic place where, according to some beliefs, humanity's Original Couple lived in perfect harmony with nature?

A contained, almost urban space, like a highly ordered French garden, or a more free and natural space like a landscape, or perhaps an Islamic, or Chinese, or Japanese garden...?

Nevertheless, there is a common point between all these conceptions: a garden symbolizes happiness.