Jim et al,
Those of us who have been heavily steeped in 'traditional' music or 'folk' music for many decades have a fairly loose agreement on what for us they consist of. That shouldn't really cause many problems.
The person who described me as a 'traditional singer' I will not embarrass by naming. She has been a highly respected member of the folk scene for several years although her involvement appears to have been mainly in contemporary song, so her loose usage of terminology I think is excusable.
However, I doubt very much if anyone who hasn't been on the folk scene for very long, or any of the 'real folk' have any idea at all what a 'traditional singer' is, in the terms accepted by us.

Jim,
You seem to claim your dictionary tells you what a traditional singer is. Is a traditional jazz singer also a traditonal singer?