I have found this word in today's edition of the New york Times but I couldn't find it in any dictionaries I looked up in. Google gives 267 entries.Below are some sentences quoting incognoscenti
Some incognoscenti grumped when they couldn’t find the word in their dictionaries. (New York Times)
Forget about techno, already being pushed aside by electro. Keep your ear on trance (in another word, noise, as the incognoscenti would mutter). (New York times)
Tim, just because your hardware/software worked ok doesn't mean it's the same for every one, particularly the incognoscenti and business users.
From these sentences the meaning should refer to people who have no knowledge on a particular matter.
Do you know how to pronounce this word? Is this a neologism?
Do you know how it's come to light?
Top answer
That appears to be the opposite of cognoscenti .
— Yankee
That appears to be the opposite of cognoscenti .
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With only 267 hits on Google, including some from English discussion forums, I'd say this word has a long way to go in terms of acceptance before it can even be considerd to be a neologism.