Here are the 2021 poverty guidelines: https://aspe.hhs.gov/topics/poverty-economic-mobility/poverty-guidelines/prior-hhs-poverty-guidelines-federal-register-references/2021-poverty-guidelines

I'd say US poverty is not having access to the things you need—food, shelter, health care, higher education—to comfortably survive in one of the world's richest nations.

If you want to do some googling about Basic Income, start here: https://www.huffpost.com/entry/city-eliminated-poverty-mincome_n_6392126