1 N-COUNT 离经叛道者;摈弃社会习俗者 If you describe someone as a drop-out, you disapprove of the fact that they have rejected the accepted ways of society, for example by not having a regular job. 离经叛道者;摈弃社会习俗者 [disapproval]
2 N-COUNT 辍学者;退学者 A drop-out is someone who has left school or college before they have finished their studies. 辍学者;退学者
3 ADJ [ADJ n] 退学的;辍学的;中途放弃的 If you refer to the drop-out rate, you are referring to the number of people who leave a school or college early, or leave a course or other activity before they have finished it. 退学的;辍学的;中途放弃的