Vine's Expository Dictionary: View Entry
ὑπερῷον hupĕrōiŏn, hoop-er-o'-on; neuter of a derivative of G5228; a higher part of the house, i.e. apartment in the third story:—upper chamber (room).
The KJV translates Strong's G5253 in the following manner: upper chamber (3x), upper room (1x).
the highest part of the house, the upper rooms or story where the women resided
a room in the upper part of a house, sometimes built upon the flat roof of the house, whither Orientals were wont to retire in order to sup, meditate, pray
Strong's Number G5253 matches the Greek ὑπερῷον (hyperōon),
which occurs 4 times in 4 verses
in the TR Greek.