Dictionary · Easton's 1897
Heaven
Meaning of words in the original,
(a) The usual Hebrew word for “heavens” is shamayim, a plural form meaning “heights,” “elevations” (Gen. 1:1; 2:1).
(b) The Hebrew word marom is also used (Ps. 68:18; 93:4; 102:19, etc.) as equivalent to shamayim, “high places,” “heights.”
(c) Heb. galgal, literally a “wheel,” is rendered “heaven” in Ps. 77:18 (R.V., “whirlwind”).
(d) Heb. shahak, rendered “sky” (Deut. 33:26; Job 37:18; Ps. 18:11), plural “clouds” (Job 35:5; 36:28; Ps. 68:34, marg. “heavens”), means probably the firmament.
(e) Heb. rakia is closely connected with (d), and is rendered “firmamentum” in the Vulgate, whence our “firmament” (Gen. 1:6; Deut. 33:26, etc.), regarded as a solid expanse.