FORTU'ITOUS, a.  [L. fortuitus, from the root of fors, forte, fortuna.  The primary sense is to come, to fall, to happen.  See Fare.] Accidental; casual; happening by chance; coming or occurring unexpectedly, or without any known cause.  We speak of fortuitous events, when they occur without our foreseeing or expecting them, and of a fortuitous concourse of atoms, when we suppose the concourse not to result from the design and power of a controlling agent.  But an event cannot be in fact fortuitous.  [See Accidental and Casual.] 
 
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