the whole sky; firmament
Literary or poetic term for the entire sky or heavens. Not used in everyday conversation; more common in classical or elevated writing.
The whole sky suddenly clouded over and thunder roared.
the whole realm; the entire world under heaven
the whole world; the entire universe
die; dice
Compound of 一 (one, whole) and 天 (sky, heavens). The exact historical derivation is uncertain, but the combination naturally yields the meaning 'the whole sky'.