1. 
   lightproof
   [adj] - not penetrable by light
   Found op http://www.webdictionary.co.uk/definition.php?query=lightproof
   
   
2. 
   lightproof
   light-tight adjective not penetrable by light; `lightproof containers`
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=lightproof
   
   
3. 
   lightproof
   1) Dark 2) Light-tight 3) Not penetrable by light
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/lightproof/1
   
   

Tip: double click on a word to show its meaning.