- n. 苍穹；天空
the apparent surface of the imaginary sphere on which celestial bodies appear to be projected
- It will cross the entire firmament , and tomorrow the sun will shine once again.
- He rose his head and stared at the firmament.
A low bank of cloud..was slowly mounting over the entire firmament, concealing the stars.出自： J. G. Farrell
High in her firmament of gin, she looked critically at her brother.出自： fig.