Source : Webster's Revised Unabridged Dictionary (1913)

Insular \In"su*lar\, a. [L. insularis, fr. insula island: cf. F.
   insulaire. See {Isle}.]
   1. Of or pertaining to an island; of the nature, or
      possessing the characteristics, of an island; as, an
      insular climate, fauna, etc.

   2. Of or pertaining to the people of an island; narrow;
      circumscribed; illiberal; contracted; as, insular habits,
      opinions, or prejudices.

            The penury of insular conversation.   --Johnson.

Insular \In"su*lar\, n.
   An islander. [R.] --Berkeley.

Source : WordNet®

insular
     adj 1: relating to or characteristic of or situated on an island;
            "insular territories"; "Hawaii's insular culture"
     2: 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
     3: narrowly restricted in outlook or scope; "little sympathy
        with parocial mentality"; "insular attitudes toward
        foreigners" [syn: {parochial}]