Transcaucasian /ˌtɹænskɔːˈkeɪzjən/adjective 1noun 1forms 3 adjective1 •In, from or otherwise relating to Transcaucasia, the region south (i.e. opposite mother Russia) of the Caucasian mountains noun1 •A person inhabiting or descended from the people of Transcaucasia formsTranscaucasians · more Transcaucasian · most Transcaucasian