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1 definition by Avis Painter

 
1.
The sum of all festivities taking place around the middle of winter (Northern hemisphere). This triumph of political correctness was invented in 1998 by Birmingham City Council. It is a contraction of winter and interval. It embraces the mix of Neopagan, Jewish, African American, Christian and secular fesitivals that occur at this time.
"Happy non-denominational, multi-cultural mid-winter festival Alan."
"Probably not, Ray, I'm going to my parents for Winterval. But thanks anyway."
by Avis Painter March 29, 2005