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Definition of precursor:

  1. He or that which precedes an event to indicate its approach; a forerunner; an omen or token; a sign.


buildup, progenitor, vanguard, preamble, presager, trumpeter, angel, precondition, forerunner, daddy, preface, granddaddy, harbinger, foregoer, foresight, show, precede, outrider, parent, messenger, herald.

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