expanse
From LSJ
English > Greek (Woodhouse)
substantive
open space: P. εὐρυχωρία, ἡ.
wide stretch of space: V. πλάξ, ἡ.
they pass over wide expanses of plain: V. χωροῦσι… πεδίων ὑποτάσεις (Euripides, Bacchae 748).
circumference: P. and V. κύκλος, ὁ, περιβολή, ἡ, περίβολος, ὁ, Ar. and P. περιφορά, ἡ.
the expanse of heaven: V. αἰθέρος κύκλος, ὁ, οὐρανοῦ περιπτυχαί, αἱ.