noun
outer garden; outer grounds
Refers to the outer garden or grounds of a shrine, temple, or large estate, often in contrast to an inner garden (内苑). Frequently appears in proper nouns.
明治神宮外苑は東京の有名な公園です。
Meiji Jingu Gaien is a famous park in Tokyo.
神社の外苑
Many trees are planted in the outer garden of the shrine.