(noun) any day when school is cancelled unexpectedly, but not necessarily because of snow.
other causes include but are not limited to:
ice (bad roads), low temperature (buses can't start), winds, power outages, no heat, lice epidemic (school closes for cleaning), sickness (so many students are out sick that it's not worth keeping the school open).

A gift from God.

What I hope I have on Monday.

An unexpected day when you are supposed to go to school but it is canceled. An unexpected break. An unexpected escape from it all. A day to relax, not a day to catch up on work.

The best school day(s) of the year. Usually despised by those who have to work.

A glorious day that is celebrated by sledding, having snowball fights, and building snow tunnels.

A day in which schools close because of the fear of being sued by ridiculous parents in the event a bus skids on the ice. Most likely to happen in Eastern Pennsylvania when the first flake of snow falls. Immediately, the schools will call in to the TV Stations to announce their closings. Each school is dependent on one another, for once a school delays or closes, all other schools decide to close as well. A school is also forced to close because otherwise students would be exhausted the next morning because they would be up all night watching the chain reaction of schools canceling, only to find out theirs did not.

Stupidest movie ever period.