invader Syllabification: (in·vad·er)Pronunciation: /inˈvādər/Translate invader | into French | into German | into Italian | into Spanish Definition of invader noun a person or group that invades a country, region, or other place:it is a country that has repelled all invaders the arrival of Spanish invadersinvader in other Oxford dictionaries Definition of invader in the British & World English dictionary