Washout/ˈwɑːʃaʊt/ Definition 1 of 4Pro Tip 1/2Event Cancellation Used specifically when events are cancelled due to bad weather, not just any cancellation. The outdoor concert was a washout due to the storm. Pro Tip 2/2Weather Dependent Implies that the event was planned but the weather made it impossible to continue. We had a barbecue planned, but it was a total washout.