See also s.vv. ˁlyh and ˁlytˀ.
For meaning 3: see DJBA; A. Demsky in Shnaton 12(2000) suggests that this word means a money chest based on a possible Phoenician parallel.
Note that in the biblical stories this structure appears to considered something other than a part of the house itself, perhaps a hut or the like erected on the roof.
Possibly also attested in Mandaic Amulet 18, line 308.