Boyd’s Bible Dictionary:
(a going up). A steep pass on the road from Jericho to Jerusalem (Josh. 15:7; 18:17; Luke 10:30-37).
Concise Bible Dictionary:
The sides of a ravine that formed the border between the lots of Judah and Benjamin, and is called the going up to or ascent of Adummim (Josh. 15:7; 18:17). It lies in the road between Jerusalem and Jericho, and agrees with the parable of the good Samaritan in being a descent from Jerusalem, and was until lately a dangerous road, infested with robbers. It is identified with Talat ed-Dumm, 31° 49' N, 35° 21' E.
Strong’s Dictionary of Hebrew Words:
Transliteration:
’Adummiym
Meaning:
plural of 121; red spots; Adummim, a pass in Palestine
Jackson’s Dictionary of Scripture Proper Names:
ruddy ones: quieted ones (?)
Potts’ Bible Proper Names:
Earthy; red; bloody things; red spots:―place in Palestine, Josh. 15:7. {Rubicunda}