Definition of "gad"

interjection:
- An exclamatory interjection roughly equivalent to 'by God', 'goodness gracious', 'for goodness' sake'.
  
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verb:
- To move from one location to another in an apparently random and frivolous manner.
  
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noun:
- A sharp-pointed object; a goad.
  
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- A metal bar.
  
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- A pointed metal tool for breaking or chiselling rock, especially in mining.
  
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- An indeterminate measure of metal produced by a furnace, perhaps equivalent to the bloom, perhaps weighing around 100 pounds.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License