1. full of shadows; dark and difficult to see clearly
2. mysterious, vague, or not clearly known or understood
3. having little substance or reality; ghostlike

Examples

• The old house had a shadowy interior with heavy curtains blocking the sunlight.
• She caught a glimpse of a shadowy figure moving through the trees.
• The politician’s shadowy past made voters suspicious of his motives.
• Police are investigating the shadowy organization behind the crime.
• A shadowy form appeared at the end of the hallway.
• The details of the agreement remain shadowy and unclear.
• He lived a shadowy existence, rarely seen in public.