below; south of
Suffix used in Kyoto street addresses to indicate a location south of a named street or landmark. Part of the traditional Kyoto address system.
This shop is located south of Shijo Street.
住所には「烏丸通下ル」と書いてある。
The address says 'south of Karasuma Street'.
From the verb 下がる (さがる, 'to go down'), used as a suffix in Kyoto addresses to mean 'south of'.