WordWeb Online

1. Filled with shade
   "we sat on rocks in a shadowy cove";
   - shady, shadowed, umbrageous
    
2. Lacking clarity or distinctness
   "shadowy figures in the gloom";
   - dim, faint, vague, wispy
    
3. Lacking in substance
   "strange fancies of unreal and shadowy worlds"; "dim shadowy forms";
   - wraithlike

Derived forms: shadowiest, shadowier

See also: indistinct, insubstantial, shaded, unreal, unsubstantial

Encyclopedia: Shadowy