From Longman Dictionary of Contemporary Englisha white Christmasa white Christmasa Christmas when there is snow → white
Examples from the Corpus
a white Christmas• Music piped from nowhere and everywhere with the dream of a white Christmas.• Who's been dreaming of a white Christmas?• Noreen was hoping for a white Christmas but she was going to be disappointed.• While many children were hoping for a white Christmas more than 500,000 families were packing their suitcases and heading for the sun.• Despite the cold snap, a white Christmas was an unlikely prospect for most people. 