From Longman Dictionary of Contemporary Englishrockabillyrock‧a‧bil‧ly /ˈrɒkəbɪli $ ˈrɑːk-/ noun [uncountable] a type of music that combines rock music and traditional country music
Examples from the Corpus
rockabilly• The Derby in Hollywood has begun a rockabilly night on Tuesdays throughout the month.• Lightning struck twice when the band played the wedding of friend Brian Setzer, the rockabilly guitarist and ex-Stray Cat. 