1. 
   Semi-formal
   In Western clothing semi-formal is a grouping of dress codes, indicating the sort of clothes worn to events with a level of protocol between informal (e.g. lounge suit) and formal.{rs|date=January 2012} The term "Semi-formal" denotes black-tie for men, rather than white-tie formalwear. ==Background...
   Found op http://en.wikipedia.org/wiki/Semi-formal
   
   
2. 
   semiformal
   [adj] - moderately formal
   Found op http://www.webdictionary.co.uk/definition.php?query=semiformal
   
   
3. 
   semiformal
   semi-formal adjective moderately formal; requiring a dinner jacket; `he wore semiformal attire`; `a black-tie dinner`
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=semiformal
   
   
4. 
   semiformal
   1) Black-tie 2) Formal 3) Moderately formal 4) Semi-formal
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/semiformal/1
   
   

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