Boyd’s Bible Dictionary:
(weeping). Perhaps a figurative “valley;” but if real, probably Gehenna (Psa. 84:6).
Concise Bible Dictionary:
This signifies “weeping.” The blessedness of going up to the courts of Jehovah turns “the valley of tears” into “the fountain of joy” (Psa. 84:6). The article being before the name seems to imply that some natural valley was before the eye of the Psalmist though unknown now.
Strong’s Dictionary of Hebrew Words:
Meaning:
from 1058, weeping; Baca, a valley in Palestine
Jackson’s Dictionary of Scripture Proper Names:
the weeper
Potts’ Bible Proper Names:
Weeping; lamentation; mulberry trees:―a valley in Palestine, Psa. 84:6. {Flens}