noun
the sky; the heavens
Formal or literary term for the vast sky or heavens, often with a poetic or philosophical tone.
太虚を見上げると、星がきらめいていた。
Looking up at the heavens, the stars were twinkling.
noun
Great Void (primordial substance in ancient Chinese philosophy)
Technical term in ancient Chinese philosophy; refers to the primordial void or substance that gives rise to qi. Rare in everyday Japanese.
古代中国哲学では、太虚は万物の根源とされる。
In ancient Chinese philosophy, the Great Void is considered the origin of all things.
From Chinese 太虛 (tàixū), literally 'great emptiness'. The term entered Japanese through classical Chinese texts and retains its philosophical and literary connotations.