Height, a town of Moab, or simply, the height=the citadel, some
fortress so called; or perhaps a general name for the highlands
of Moab, as some think (Jer. 48:1). In Isa. 25:12, the word is
rendered “high fort.”
Smith's Dictionary
(height), a place in Moab. (Jeremiah 48:1) It appears to be mentioned also in (Isaiah 25:12) thorough there rendered in the Authorized Version “high fort.”