The Collaborative International Dictionary of English v.0.48:
insularism \insularism\ n. the state of being insulated. Syn: insulation, insularity, detachment. [WordNet 1.5]WordNet (r) 3.0 (2006):
insularism n 1: the state of being isolated or detached; "the insulation of England was preserved by the English Channel" [syn: insulation, insularity, insularism, detachment]