mournabration Share definition Flag An event that marks sad and happy events simultaneously; both a mourning and a celebration. My best friend since preschool just got a fabulous new job in a city 3,000 miles away, we're going to her mournabration party. mournabration by KM-CF-EH December 9, 2008 0 0 Get merch Get the mournabration mug. Buy Now — $32.95 See more merch