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.
Happening independently of human will or means of foresight; resulting from unavoidable physical causes. Abbott.
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