רָקִיעַrâqîyaʻ

extended surface, expanse, (solid), as if beaten out

Pronunciation: raw-kee'-ah · Hebrew/Aramaic (Old Testament) · H7549

Meanings

1. expanse, (flat) (Ezekiel 1:22; Ezekiel 1:23; Ezekiel 1:25)

2. the vault of heaven, or 'firmament, ' regarded by Hebrews as solid, and supporting 'waters' above it (Genesis 1:6; Genesis 1:7; Genesis 1:8)

Same root

רָקַעrâqaʻ · H7554to pound the earth (as a sign of passion); by analogy to expand (by hammering); by implication, to overlay (with thin sheets of metal)

Where it appears

Appears 17 times in the Bible.

Genesis 1:6 Then God said, “Let there be a space between the waters, to separate the waters of the heavens from the waters of the earth.”
Genesis 1:7 And that is what happened. God made this space to separate the waters of the earth from the waters of the heavens.
Genesis 1:8 God called the space “sky.” And evening passed and morning came, marking the second day.
Genesis 1:14 Then God said, “Let lights appear in the sky to separate the day from the night. Let them be signs to mark the seasons, days, and years.
Genesis 1:15 Let these lights in the sky shine down on the earth.” And that is what happened.
Genesis 1:17 God set these lights in the sky to light the earth,

See every passage

Genesis 1:6, 1:7, 1:8, 1:14, 1:15, 1:17, 1:20
Psalms 19:1, 150:1
Ezekiel 1:22, 1:23, 1:25, 1:26, 10:1
Daniel 12:3

Source: Brown, Driver and Briggs, Hebrew and English Lexicon of the Old Testament (1906), public domain; markup by unfoldingWord, CC BY (github.com/unfoldingWord/Brown-Driver-Briggs-Enhanced).