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Short for "happy accident." When something that was unplanned or didn't turn out as planned opens the door to a discovery or a new application.
Unlike classic discoveries like penicillin, sticky notes, and liquid paper correction, we are visited by hapcidents more often than we might admit.
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by MathPlus January 27, 2017
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A unplanned for situation/accident that is pleasant or happy;

An accidental event that brings joy instead of grief.
The breaking of the ugly vase was such a hapcident !

They met due to a fender bender, it was a hapcident.
by WordGirlQueen December 22, 2011
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