1. 
   vibrating
   [adj] - moving very rapidly to and fro or up and down
   Found op http://www.webdictionary.co.uk/definition.php?query=vibrating
   
   
2. 
   vibrating
   vibratory adjective moving very rapidly to and fro or up and down; `the vibrating piano strings`
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=vibrating
   
   
3. 
   Vibrating
   • (p. pr. & vb. n.) of Vibrate
   Found op http://thinkexist.com/dictionary/meaning/vibrating/
   
   
4. 
   vibrating
   1) Moving 2) Moving very rapidly to and fro or up and down 3) Vibratory
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/vibrating/1
   
   

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