Definition of drop out phrasal verb from the Oxford Advanced Learner's Dictionary

Phrasal Verbs

    drop out (of something)

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  1. 1  to no longer take part in or be part of something He has dropped out of active politics. a word that has dropped out of the language
  2. 2  to leave school, college, etc. without finishing your studies She started a degree but dropped out after only a year. related noun dropout (1) See related entries: Teaching and learning
  3. 3to reject the ideas and ways of behaving that are accepted by the rest of society related noun dropout (2)
See the Oxford Advanced American Dictionary entry: drop out