WordNet (r) 3.0 (2006):

Colossae
    n 1: an ancient city in south western Phrygia in Asia Minor;
         site of an early Christian Church

Easton's 1897 Bible Dictionary:

Colossae
   or Colosse, a city of Phrygia, on the Lycus, which is a
   tributary of the Maeander. It was about 12 miles above Laodicea,
   and near the great road from Ephesus to the Euphrates, and was
   consequently of some mercantile importance. It does not appear
   that Paul had visited this city when he wrote his letter to the
   church there (Col. 1:2). He expresses in his letter to Philemon
   (ver. 1:22) his hope to visit it on being delivered from his
   imprisonment. From Col. 1:7; 4:12 it has been concluded that
   Epaphras was the founder of the Colossian church. This town
   afterwards fell into decay, and the modern town of Chonas or
   Chonum occupies a site near its ruins.