Like a ghost in appearance; deathlike; pale; pallid; dismal.
- Inspiring shock, revulsion, or horror by or as if by suggesting death; terrifying: a ghastly murder.
- Suggestive of or resembling ghosts.
- Extremely unpleasant or bad: "in the most abominable passage of his ghastly little book” ( Conor Cruise O'Brien).
- Very serious or great: a ghastly error.