noun
beyond the heavens; farthest regions
Literary or poetic term for a place far beyond the sky or the known world. Often used in fixed expressions like 天外孤独 or in classical contexts.
彼は天外の地を夢見て旅立った。
He set off dreaming of a land beyond the heavens.
Compound of 天 (heaven) and 外 (outside). The exact historical derivation is uncertain, but the word has been used in classical Japanese and Chinese-influenced texts to mean a realm beyond the sky.