adv. 1. With imperfect light, clearness, or knowledge; obscurely; dimly; blindly; uncertainly. [ 1913 Webster ]
What fame to future times conveys but darkly down. Dryden. [ 1913 Webster ]
so softly dark and darkly pure. Byron. [ 1913 Webster ]
2. With a dark, gloomy, cruel, or menacing look. [ 1913 Webster ]
Looking darkly at the clerguman. Hawthorne. [ 1913 Webster ]