A messenger, especially one bringing important news.

“The herald blew his trumpet and shouted that the King was dead.”

A harbinger, giving signs of things to come.

“Daffodils are heralds of Spring.”

An official whose speciality is heraldry, especially one between the ranks of pursuivant and king-of-arms.

“Rouge Dragon is a herald at the College of Arms.”

To proclaim or announce an event.

“Daffodils herald the Spring.”

(usually passive) To greet something with excitement; to hail.

“The film was heralded by critics.”