Adjective
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narrowly restricted in outlook or scope
"little sympathy with parochial mentality"
"insular attitudes toward foreigners"
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suggestive of the isolated life of an island
"an exceedingly insular man
so deeply private as to seem inaccessible to the scrutiny of a novelist"- Leonard Michaels
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relating to or characteristic of or situated on an island
"insular territories"
"Hawaii's insular culture"