Dungeon - literally, house of a cistern or pit, and evidently underground. In this cistern-like excavation were several cells or arched vaults, in one of which with little light and less ventilation Jeremiah remained a long time.
Related Commentaries of Jeremiah 37:16
Jeremiah 37:16
16 When Jeremiah was entered into the dungeon, and into the cabins,f and Jeremiah had remained there many days;