Expertise | Definition of expertise by Merriam-Webster

Full Definition of EXPERTISE

1

: expert opinion or commentary

2

: the skill of an expert

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While the declared nuclear powers have wobbled in their commitment to get rid of their arsenals, the rise of a global black market in nuclear expertise and materials has made the Bomb more attainable for everyone else. —Michael Elliott, Time, 1 Aug. 2005
The English magazine The Spectator employs me as “Dear Mary,” a so-called agony aunt, in which capacity I have over the years gained considerable expertise in various areas of etiquette … —Mary Killen, Atlantic, May 2001
Can anyone out there drive a bloody automobile? By driving I do not mean simply guiding a two-ton lump of steel and plastic along a smooth stretch of macadam, but actually steering, braking, and shifting the thing with a modicum of competence, if not outright expertise. —Brock Yates, Car & Driver, October 2001
If a company that spends millions of dollars a year on a fancy advertising campaign to brag about its Web design expertise can't steer a motivated buyer like me to a Buy Now button in less than 30 minutes, then what hope is there for smaller, less experienced retail sites? —Michelle Slatalla, New York Times, 8 Mar. 2001
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