See pastoral in Webster's New World College Dictionary
adjective
of shepherds or their work, way of life, etc.
of or portraying rural life or, formerly, a highly conventionalized form of rustic life among shepherds, usually in an idealized way
of pastoral literature or a pastoral
characteristic of rural life, idealized as peaceful, simple, and natural
of or relating to a pastor
noun
a piece of literature dealing, usually in an idealized way, with rural life; formerly, specif., a poem, play, etc. treating the rustic lives and loves of shepherds in a conventionalized, artificial manner
such writing as a literary form
a pastoral picture or scene
an official letter or document, as on doctrine or religious observance, issued by a bishop or group of bishops to persons within their jurisdiction