1. 
   updating
   [n] - the act of changing something to bring it up to date (usually by adding something)
   Found op http://www.webdictionary.co.uk/definition.php?query=updating
   
   
2. 
   updating
   noun the act of changing something to bring it up to date (usually by adding something); `criminal records need regular updating`
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=updating
   
   
3. 
   updating
   1) Change 2) Keeping current 3) Making current
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/updating/1
   
   

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