1. 
   preferentially
   [adv] - in a preferential manner
   Found op http://www.webdictionary.co.uk/definition.php?query=preferentially
   
   
2. 
   preferentially
   adverb in a preferential manner; `he was treated preferentially`
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=preferentially
   
   
3. 
   preferentially
   1) In a preferential manner
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/preferentially/1
   
   

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