herald-v; 2 Senses

Sense Number 1: Foreshadow or presage.

NOTE: action of the verb occurs before a new state or event.

The asteroid heralded a new era of life.
Darkened skies herald rain.
Snowmelt heralds Spring.

VerbNet: NM
FrameNet: Omen
PropBank: NM
WordNet 3.0 Sense Numbers: 1

Sense Number 2: Praise vociferously, perhaps at the outset of something.

NOTE: action of the verb occurs while a new state or event is coming to be or already evident.

The critics heralded the pianist as a new master.
They all heralded the knight's entrance.
Flowers herald Spring.
Her screams heralded the arrival of their newborn child.

VerbNet: judgment-33.1-1-1
FrameNet: Heralding
PropBank: herald.01
WordNet 3.0 Sense Numbers: 2, 3