Of or pertaining to the firmament or heavens.(adjective)
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Use "firmamental" in a sentence
"It never was, never will be Besides, if there be infinite planetary and firmamental worlds, as [6610] some will, there be infinite genii or commanding spirits belonging to each of them; and so, per consequens (for they will be all adored), infinite religions."
"The dark rim of the upland drew a keen sad line against the pale glow of the sky, unbroken except where a young cedar on the lawn, that had outgrown its fellow trees, shot its pointed head across the horizon, piercing the firmamental lustre like a sting."
"The firmamental conflagration faded away, and the soft night spread its shadows over the earth."