Of or pertaining to an island; of the nature, or possessing the characteristics, of an island; as, an insular climate, fauna, etc.

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

An islander.

Of or pertaining to an island or its characteristics (i.e., isolated).

Having the qualities and properties of an island. Real islands are not alone in possessing such properties of isolation: an oasis in the middle of a desert also has qualities of insularity. De Blij, H. J., and Perter O. Muller; Geography - Regions and Concepts; John Wiley and Sons, Inc.; New York, Chichester, Brisbane, Toronto and Singapore; 1992; page 606.

Either of an island, or suggestive of the isolated condition of an island.

relating to or characteristic of or situated on an island; "insular territories"; "Hawaii's insular culture"

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