Brunei Darussalam /bɹuˈnaɪ ˌdɑɹ.u(s).səˈlɑm/ noun1 •The official name of Brunei, a country in Southeast Asia.Brunei Darussalam is situated on the north-west of the island of Borneo, between east longitudes 114 degrees 04' and 11 degrees 23' and north latitudes of 4 degrees 00' and 5 degrees 05'. — 2007