(1):
(a.) Happening independently of human will or means of foresight; resulting from unavoidable physical causes.
(2):
(a.) Happening by chance; coming or occuring unexpectedly, or without any known cause; chance; as, the fortuitous concourse of atoms.
A timeless resource no serious scholar should be without. With more than 75,000 entries, if it is a word used in the Bible, you are sure to find it defined here.Wikipedia
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