(literary) a large mountain valley; a deep gully; a deep trench

(literary) the waterway or channel beneath a bridge arch

(literary) a mountain torrent or flash flood

Used in place names, such as Lǔhóng 鲁谼 lǔ​hóng in Anhui or Hónggǔ 谼谷 hóng​gǔ in Henan