FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

ouranos οὐρανός — oo-ran-os' — perhaps from the same as 3735 (through the idea of elevation); the sky; by extension, heaven (as the abode of God); by implication, happiness, power, eternity; specially, the Gospel (Christianity):--air, heaven(-ly), sky.

see GREEK for 3735