insular

Of or being, pertaining to, situated on, or resembling an island or islands.

Separate or isolated from the surroundings; having little regard for others opinions or prejudices; provincial.

Having an inward-looking, standoffish, or withdrawn manner.

(often with a capital letter) Relating to the varieties of a language or languages spoken chiefly on islands. Insular Latin, Latin as it was spoken in Britain and Ireland. Insular Celtic, the Celtic languages of Britain, Ireland and also Brittany, as opposed to those spoken in mainland Europe other than Brittany. Insular Scandinavian, relating to the Icelandic and Faroese languages as opposed to the ones spoken in Sweden, Denmark and Norway.

Relating to the insula in the brain.

Relating to insulin.

An islander.