Probably, as Gesenius argues, the door-case of a door, including the lintel and side posts. The posts of the doors of the temple were of olive wood. (1 Kings 6:33)
A courier or carrier of messages, used among other places in (Job 9:25)
Smith’s Bible Dictionary
Post
Smith’s Bible Dictionary, William Smith (1863). Public domain, from the CrossWire SWORD module.