01 a. Happening by chance; coming or occuring unexpectedly, or without any known cause; chance; as, the fortuitous concourse of atoms.
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1.
Happening by chance; coming or occuring unexpectedly, or without any known cause; chance; as, the fortuitous concourse of atoms.“It was from causes seemingly fortuitous . . . that all the mighty effects of the Reformation flowed.” — Robertson.“So as to throw a glancing and fortuitous light upon the whole.” — Hazlitt.
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2.
Happening independently of human will or means of foresight; resulting from unavoidable physical causes.(LAw)
Syn.
Accidental; casual; contingent; incidental. See Accidental.