Bible dictionaries
CoeleSyria
What Bible dictionaries say about “CoeleSyria”, one article after the other.
Easton’s Bible Dictionary & Webster’s 1828 Dictionary
CoeleSyria - (Easton's Bible Dictionary)
Hollow Syria, the name (not found in Scripture) given by the Greeks to the extensive valley, about 100 miles long, between the Lebanon and the Anti-Lebanon range of mountains.
Matthew George Easton, Easton’s Bible Dictionary; Noah Webster, American Dictionary of the English Language (1828)
The article in Easton + Webster 1828Smith’s Bible Dictionary
(hollow Syria), the remarkable valley or hollow which intervenes between Libanus and Anti-Libanus, stretching a distance of nearly a hundred miles. The only mention of the region as a separate tract of country which the Jewish Scriptures contain is probably that in (Amos 1:5) where "the inhabitants of the plain of Aven" are threatened in conjunction with those of Damascus. The word is given in the Authorized Version as CELO-SYRIA.
William Smith; revised by F. N. Peloubet and M. A. Peloubet; CrossWire SWORD module Smith 1.3
The article in Smith