Pronunciation: (därk'lē), [key]
1. so as to appear dark.
2. vaguely; mysteriously.
3. in a vaguely threatening or menacing manner: He hinted darkly that we had not heard the last of the matter.
4. imperfectly; faintly.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.