very extensive or encompassing; of great scope: a large-scale business plan.
made to a large scale: a large-scale map.

1885–90 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To large-scale
World English Dictionary
1.  wide-ranging or extensive
2.  (of maps and models) constructed or drawn to a big scale

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
There is a difference between a pilot programme-with everyone anxiously working
  towards good results-and a large-scale operation.
Large-scale growers can keep it from devastating their harvests only by
  spraying fungicides from airplanes.
At last, his lifelong dream of a career creating large-scale extravaganzas for
  princely dwellings was coming true.
It was the world's first large-scale underwater archeological excavation.
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