Harbinger

Noun

 * 1) A person or thing that foreshadows or foretells the coming of someone or something.

Synonyms

 * herald, omen, premonition, sign, signal, prophet

Verb

 * 1)  To announce; to be a harbinger of.

Synonyms

 * herald

Thesaurus
ancestor, announce, announcer, antecedent, augury, avant-garde, bellwether, buccinator, buccinator novi temporis, bushwhacker, evangel, evangelist, explorer, forebear, foregoer, forerun, forerunner, foreshadower, foreshow, foretoken, front runner, frontiersman, fugleman, give notice, groundbreaker, guide, herald, herald angel, innovator, lead runner, leader, messenger, notify, omen, outrider, pathfinder, pioneer, point, portent, preannounce, precedent, precursor, predecessor, preindicate, premonitor, presage, presager, proclaim, run before, scout, sign, stormy petrel, trailblazer, trailbreaker, vanguard, vaunt-courier, voortrekker