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Definition of fortuitous:

  1. Happening by chance; coming or occuring unexpectedly, or without any known cause; chance; as, the fortuitous concourse of atoms.
  2. Happening independently of human will or means of foresight; resulting from unavoidable physical causes.


uncaused, reasonless, inadvertent, unintended, contingent, odd, causeless, fortunate, surprise.

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