Boyd’s Bible Dictionary:
(fuller’s fount). A celebrated spring (Josh. 15:7; 18:16; 2 Sam. 17:17; 1 Kings 1:9).
Concise Bible Dictionary:
A spring on the border of Judah and Benjamin. It was where Jonathan and Ahimaaz stayed in secret, to carry to David any message from Hushai, on the revolt of Absalom; and close to this spring Adonijah called the king’s sons together when he exalted himself to succeed David as king (Josh. 15:7; Josh. 18:16; 2 Sam. 17:17; 1 Kings 1:9). It was no doubt a spring not far from Jerusalem. Bir Eyub, about half a mile south of Jerusalem was long supposed to be the spot, but this is a well, not a spring. The Fountain of the Virgin, near the south east corner of the city, is now more generally chosen; but this appears to be too near the city to coincide with the above events.
Strong’s Dictionary of Hebrew Words:
Meaning:
from 5869 and the active participle of 7270; fountain of a traveller; En-Rogel, a place near Jerusalem: --En-rogel.
Jackson’s Dictionary of Scripture Proper Names:
fount of the spy
Potts’ Bible Proper Names:
Fountain of the fuller; fountain of a traveler:―place near Jerusalem, Josh. 15:7. {Fons fullonis}