rar·o·ton·gan I. \|rarə|täŋgən\adjective Usage: usually capitalized Etymology:Rarotonga, chief island of the Cook islands in the southern Pacific + English -an : of or relating to the island or language of Rarotonga II. noun (-s) Usage: capitalized 1.: a native or inhabitant of Rarotonga 2.: the Polynesian language of the Rarotongan people