WordWeb Online

1. Transmitting light; able to be seen through with clarity
   "transparent crystal";
   - crystalline, crystal clear, limpid, lucid, pellucid
    
2. So thin as to transmit light
   "transparent chiffon";
   - diaphanous, filmy, gauzy, gauze-like, gossamer, see-through, sheer, vaporous, vapourous [Brit, non-standard], cobwebby, vapoury [Brit, Cdn], vapory [US]
    
3. Free of deceit
   "The transparent peasant turned with a sheepish grin";
   - guileless
    
4. Easily understood or seen through (because of a lack of subtlety)
   "a transparent explanation";
   - transpicuous [rare]

See also: clear, obvious, square, straight, thin

Encyclopedia: Transparent