The definition of a have not is someone or a group of people who does not possess as much material wealth or resources as others.
A have not is a homeless person who lives on the street.
Informal a person or nation with little wealth or poor resources
One enjoying little or no material wealth: “The gap between the haves and the have-nots still shows up clearly at the polls” (Brad Edmondson).
- singular variant of have nots.