n11 of these refer to ‘firmament’ of heaven, which is the meaning in
n5 others refer to some object in Ezekiel’s vision, which may be solid, but
this is not certain;
nThe other, Ps 150:1, may refer to the heavenly firmament, or to the
‘expanse’ of God’s power.
nIn any case, the noun refers to something expanded, whether solid or
not, thick or thin, however it was spread out.