1. 
   Earthing
   Method of connecting most exposed metal work in a building and metal appliances to electrical Earth - nominally 0V. Windows and shelves are normally excluded but most metal pipes etc. are included. This means that in the event of a fault - eg. Live wire touching a metal case, then the earth will fac...
   Found op http://basic1.easily.co.uk/039069/01C053/electrical_glossary.htm
   
   
2. 
   Earthing
   • (p. pr. & vb. n.) of Earth
   Found op http://thinkexist.com/dictionary/meaning/earthing/
   
   
3. 
   earthing
   1) Attachment 2) Fastening 3) Grounding
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/earthing/1
   
   

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