cutting edge

the sharp edge of a cutting implement.
forefront; lead: on the cutting edge of computer technology.


cutting-edge, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
cutting edge
1.  the leading position in any field; forefront: on the cutting edge of space technology
2.  at the forefront of people or things in a field of activity; leading: cutting-edge technology

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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Word Origin & History

cutting edge
also cutting-edge, 1825 in the literal sense (often at first with reference to plows); fig. sense is from c.1970.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
JP doesn't have to be quite so cutting-edge: there are plenty of well-known
  dinosaurs that weren't in the newspaper yesterday.
In order to highlight the use of this cutting-edge material, wherever it is
  employed it is visible to the eye.
Nanotechnology is a cutting-edge advancement within science and engineering.
Universities may be the source of cutting-edge knowledge but are rarely
  cutting-edge organizationally.
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