G5253 — huperoon
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
huperoon — pronounced hoop-er-o'-on
neuter of a derivative of 5228; a higher part of the house, i.e. apartment in the third story:--upper chamber (room). see GREEK for 5228
4 occurrences in the KJV.
Acts 1:13
And when they were come in, they went up into an upper room, where abode both Peter, and James, and John, and Andrew, Philip, and Thomas, Bartholomew, and Matthew, James the son of Alphaeus, and Simon Zelotes, and Judas the brother of James.
Acts 9:37
And it came to pass in those days, that she was sick, and died: whom when they had washed, they laid her in an upper chamber.
Acts 9:39
Then Peter arose and went with them. When he was come, they brought him into the upper chamber: and all the widows stood by him weeping, and shewing the coats and garments which Dorcas made, while she was with them.
Acts 20:8
And there were many lights in the upper chamber, where they were gathered together.