1. a person who goes ahead and makes known the approach of another; herald.
2. anything that foreshadows a future event; omen; sign: Frost is a harbinger of winter.
3. a person sent in advance of troops, a royal train, etc., to provide or secure lodgings and other accommodations.–Dictionary.com
1. grim; unfriendly; hostile; sinister: his forbidding countenance.
2. dangerous; threatening: forbidding clouds; forbidding cliffs.