Biqah denotes a wide, flat valley — not a narrow ravine but a broad, open plain surrounded by higher ground. It appears 20 times, describing real geographical features in Israel (the Bekaa Valley of Lebanon, the Valley of Megiddo) as well as symbolic and eschatological landscapes.
The broad valley in Scripture is often a place of vision, revelation, and decisive encounter. Ezekiel receives his famous dry-bones vision "in the valley" (biqah). Isaiah sees the eschatological highway being prepared through the valleys. The humble and low places are exalted — valleys filled in, mountains brought low — picturing God's great reversal. The biqah is where the LORD's glory is revealed to all flesh.