A province of Europe on the east of the Adriatic sea, and forming part of Illyricum. It was contiguous to Macedonia, Upper Moesia, and Liburnia, from which latter it was divided by the river Titius. Hither Titus was sent by Paul to spread the knowledge of Christianity, 2 Timothy 4:10.
Source: ATS Bible Dictionary
Dalmatia
A mountainous country on the eastern shore of the Adriatic, a part of the Roman province of Illyricum. It still bears its ancient name. During Paul's second imprisonment at Rome, Titus left him to visit Dalmatia (2 Timothy 4:10) for some unknown purpose. Paul had himself formerly preached in that region (Romans 15:19).
The present Emperor of Austria bears, among his other titles, that of "King of Dalmatia."
Source: Easton's Bible Dictionary
Dalmatia
a mountainous district on the eastern coast of the Adriatic Sea. St. Paul sent Titus there. (2 Timothy 4:10)