Abbott-Smith Manual Greek Lexicon
ὑπερῷον (G5253)
4 ὑπερῷον , -ου, τό (neut. of ὑπερῷος , above, ὑπέρ ) [in LXX for עֲלִיָּה and cogn. forms ;] in cl., the upper story or upper rooms where the women resided (Hom., a1.). In LXX and NT, an upper chamber, roof-chamber , built on the flat roof of the house (v. DB , iii, 674a): Ac 1:13 9:37 , 39 20:8 (cf. IV Ki 23:22 ).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain