the GNU version of the Collaborative International Dictionary of English
n. Accident; chance; casualty.
The Century Dictionary and Cyclopedia
n. Accident; chance; casualty.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. anything that happens suddenly or by chance without an apparent cause
Word Usage
"Locals may recall his collaboration with composer John Adams for the San Francisco Opera production of Doctor Atomic (which, in an instance of festival fortuity, is documented in Jon Else's Wonders Are Many)."