Definition from macmillandictionary.com
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a poor family/area/country
We were very poor and could barely afford the necessities of life.
the gap between the rich and the poor
The rebels’ defences were poor and they were quickly overcome.
poor housing conditions
I was always put with the poorest students in the class.
food with poor nutritional value
a country poor in natural resources
The poor child had lost both his parents.
Poor old Anthony was left to look after the baby.