Pre*cur"sor (?), n. [L. praecursor, fr. praecurrere to run before; prae before + currere to run. See Course.]
One who, or that which, precedes an event, and indicates its approach; a forerunner; a harbinger.
Evil thoughts are the invisible, airy precursors of all the storms and tempests of the soul.
Syn. -- Predecessor; forerunner; harbinger; messenger; omen; sign.
© Webster 1913.