unbeatableun‧beat‧a‧ble /ʌnˈbiːtəbəl/ adjective Word Family: noun: beat, beating; adjective: beatable ≠ unbeatable, beaten ≠ unbeaten; verb: beat1. something that is unbeatable is the best of its kind: carpets at unbeatable prices2. a team, player etc that is unbeatable cannot be defeated