1 [ek-sper-teez]

1865–70; < French: survey, report (made by experts); -ise taken as an abstract noun suffix. See expert, -ise2 Unabridged


2 [ek-sper-tahyz]
verb (used with object), verb (used without object), expertised, expertising. Chiefly British. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
expertise (ˌɛkspɜːˈtiːz)
special skill, knowledge, or judgment; expertness
[C19: from French: expert skill, from expert]

expertize or expertise (ˈɛkspɜːˌtaɪz)
(US) to act as an expert or give an expert opinion (on)
expertise or expertise

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

1868, from Fr. expertise (16c.) "expert appraisal, expert's report;" see expert.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The knowledge, expertise, and skills that you gain early on will form the
  foundation for your later investigations.
My expertise is all about ambushing and harrasing the opponent.
They invite me to appear at conferences to share my expertise.
This is a demanding position where you will make significant use of your
  scientific expertise.
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