1) extended surface (solid), expanse, firmament

1a) expanse (flat as base, support)

1b) firmament (of vault of heaven supporting waters above)

1b1) considered by Hebrews as solid and supporting 'waters' above

Root √רקע: רָקַע vb beat stamp beat out spread out Qal I will stamp them down Pi with gold overlayeth it . a goldsmith Pu silver beaten out .. Hiph canst thou make with him a spreading for clouds .(= like) .

רָקִיעַ n.m extended surface expanse expanse (flat) the vault of heaven, or ‘firmament,’ regarded by Hebrews as solid, and supporting ‘waters’ above it . (solid)