Smith's Bible Dictionary
Kir of Moab
Kir of Mo'ab. (fortress of Moab). One of the two chief strongholds of Moab, the other being Ar of Moab. The name occurs only in Isaiah 15:1 though the place is probably referred to under the names of Kir-heres, Kir-harseth, etc. It is almost identical with the name Kerak, by which the site of an important city in a high and very strong position at the southeast of the Dead Sea is known at this day. Its situation is truly remarkable. It is built upon the top of a steep hill, surrounded by a deep and narrow valley, which again is completely enclosed by mountains rising higher than the town and overlooking it on all sides.
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Smith, William, Dr. Entry for 'Kir of Moab'. Smith's Bible Dictionary. https://www.studylight.org/dictionaries/eng/sbd/k/kir-of-moab.html. 1901.