Definition of "underachieving" []

• Present participle of underachieve. (verb)

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• "The so called "underachieving" class has been given extra help and their scores individually have been improving, but there is no way they will reach the levels of the previous class."
• "I'm a former teacher and I taught in whats termed underachieving schools."
• "So when we say he is underachieving, that is relative to some extremely high expectations."