Definition of the poverty line noun from the Oxford Advanced Learner's Dictionary

 

the poverty line

 noun
noun
BrE
 
; NAmE
 
(also the poverty level especially in US English)[singular]
 
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the official level of income that is necessary to be able to buy the basic things you need such as food and clothes and to pay for somewhere to live A third of the population is living at or below the poverty line.
See the Oxford Advanced American Dictionary entry: the poverty line