1. 
   Vau
   [letter] This category includes all pretenders to the throne of the French empire (Bonapartists) (1815-1852 and from 1870 until today): ...
   Found op http://en.wikipedia.org/wiki/Vau_(letter)
   
   
2. 
   VAU
   (Aviation abbreviations:) voltage averaging unit
   Found op http://www.aviationonline.co.uk/glossary/uz.htm
   
   
3. 
   vau
   1) ... -de-vire (historic french valley) 2) Hebrew letter (vav) 3) Voltage averaging unit
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/vau/1
   
   

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