The meaning of Doors in the Bible
(From Easton's Bible Dictionary)

moved on pivots of wood fastened in sockets above and below (Proverbs 26:14). They were fastened by a lock (Judges 3:23,25; Cant 5:5) or by a bar (Judges 16:3; Job 38:10). In the interior of Oriental houses, curtains were frequently used instead of doors.

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