imu Syllabification: (i·mu)Pronunciation: /ˈēmo͞o/Definition of imu noun (in Hawaii) an underground oven in which meat and vegetables are cooked, traditionally by means of heated stones covered with vegetation:kalua pig is usually the centerpiece of a Hawaiian luau, where it is cooked in an imuOrigin:Hawaiianimu in other Oxford dictionaries Definition of imu in the British & World English dictionary