American Heritage Dictionary
(2)
Century Dictionary
(1)
GNU Webster's 1913
(1)
WordNet
(1)
Elsewhere on the web
Resume advice: You are cool, nifty, and successful (now prove it)— MSDN Blogs
That might be kind of nifty, especially if the lid is spring-loaded to pop open every time I sit down.— PC Magazine: New Product Reviews
Internet TV: CHL Network (www. nifty-tv.com / chl)— OurSports Central Baseball News
The launch of the 3G iPhone last summer gave the market a boost-with nifty, practical applications such as maps, GPS services, games, news and social networking building momentum.— eMarketer Articles
If you're a fan of classic console emulators on PSP, you have no doubt heard of DaveX - he's well-known for his nifty mods for emulators like NesterJ, and most recently,

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You can expect to see this word about twice a month.
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