The phrase "an insularity" is correct and usable in written English.
It can be used to describe a state of being isolated or detached from others, often in a social or cultural context.
Example: "The insularity of the community made it difficult for newcomers to integrate."
Alternatives: "a seclusion" or "an isolation".
There's an airlessness and an insularity to the performance that saps it of some energy.
But those restrictions have also fostered an insularity that can make outsiders feel left out.
"There is an insularity here," Mayor Bruce Botelho said, "that I think is a net positive".
Bequeathed from father to son, glass recipes or partite became wreathed in secrecy, fostering an insularity that persisted even beyond the Republic's collapse in 1808.
Despite its slowly altering face, Bay Ridge still has an insularity, a separateness that both the article and the movie tried to capture.
But some of the same dynamics that fed the crisis in Catholicism — an aloof patriarchy, an insularity verging on superiority, a disinclination to get secular officials involved — exist elsewhere.
A few of the names that circulated suggested an astonishing insularity among Labour MPs and activists, some of whom seemed to think the party could merrily thrust even a virtual unknown into Downing Street.Of course, there is a good reason why Labour keeps plunging back into this regicidal trauma.
The near-messianic faith that IKEA employees have in the rightness of their cause can lead to an odd insularity.
But Obama is also a human being, a flawed and complicated one, and as the world has come to know him better we have sometimes seen the downside of his temperament: a certain insularity and self-satisfaction; a tendency at times — as in the first debate with Mitt Romney — to betray disdain for the unpleasant tasks of politics.
As Rose natters her way through a thicket of banalities -- about the food, the weather and her husband's job as a driver -- she emerges as a haunted Pinter prototype, a woman who has retreated into a muffling insularity through terror of the unknown.
If there had been a weakness in Magee's Men of Ideas, it was a certain insularity: it confined itself to Anglo-American philosophers at a time when some of the most talked-about developments were taking place on the continent.
