This page provided courtesy of Bill Martin at Bubbaguitar.com.
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Today "old-time" refers to the rural traditional music and song from the South and Midwest. Its played primarily on acoustic instruments, such as the fiddle, the banjo, guitar. A modern old-time band often looks and sounds like a really redneck bluegrass band. Old-time, however, is often played solo, or the songs are sung by a single unaccompanied voice. The repertoire is a grab bag of folk songs, popular tunes, gospel songs, ballads from the British Isles, and square dance tunes.
 
Those who are sick in love with the music define it more broadly: African-American and Native-American folk music; acoustic country blues and related guitar, fiddle and banjo blues; jugbands; much of the more traditional elements of Mexican and Canadian folk music; Cajun music; the old New England contra dance fiddle tunes and styles; cowboy songs; early bluegrass, etc., played on a wide variety of instruments. See? You're probably an old-time music fan and don't even know it!
Below are a few links to other pages with definitions of what Old-Time Music is.
What is this Old-Time Music?

Defining Old-Time Music.

Is it Old-Time or Bluegrass?

Take Me Home!

 
Norman Edmonds
Virginia Fiddler