Definition of dropout noun from the Oxford Advanced Learner's Dictionary
dropout
noun
ˈdrɒpaʊt ˈdrɑːpaʊt
1a person who leaves school or college before they have finished their studiescollege dropoutsa university with a high dropout rate2a person who rejects the ideas and ways of behaving that are accepted by the rest of societyHe's a dropout who will never have a steady job.