Stair - Vine's Expository Dictionary of New Testament Words
Stair[ 1,,G304, anabathmos ]
an ascent" (akin to anabaino, "to go up"), denotes "a flight of stairs," Acts 21:35, Acts 21:40. These were probably the steps leading down from the castle of Antonia to the Temple. (See Josephus, B.J., v., 5,8.) In the Sept., it is used, e.g., in the titles of the Songs of Ascents, Ps. 120-134.