Boyd’s Bible Dictionary:

(lofty). (1) An ancient name of Mount Hermon (Deut. 4:48). (2) Greek form of Zion (Matt. 21:5; John 12:15; Heb. 12:22; Rev. 14:1).

Concise Bible Dictionary:

1. Deuteronomy 4:48; same as HERMON.
2. For a part of Jerusalem, see ZION.

Jackson’s Dictionary of Scripture Proper Names:

parched place (another name for Mt. Zion) : elevation: a bearing: carrying (another name for Mt. Hermon) Dent. 4:48 : (in N. T.) Greek for Zion