adj. Happening by chance; coincidental or accidental.
adj. Happening by a lucky chance; lucky or fortunate.
adj. Happening independently of human will.
the GNU version of the Collaborative International Dictionary of English
adj. Happening by chance; coming or occuring unexpectedly, or without any known cause; chance.
adj. Happening independently of human will or means of foresight; resulting from unavoidable physical causes.
The Century Dictionary and Cyclopedia
Accidental; casual; happening by chance; coming or occurring without any cause, or without any general cause; random.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. occurring by happy chance
adj. having no cause or apparent cause
Word Usage
"Hence there grew up the belief that events which we describe as fortuitous or random or subject to chance are no different from any other happenings, except that we do not know why they happen."