Definition of "first-order"

first-order

adjective
not comparable
1. (mathematics, logic) Of one of a series of models, languages, relationship, forms of logical discourse, etc., being the simplest one or the first in a sequence.
2. Of fundamental importance.
  Quotations
  If our goal is to put out the fire—to alleviate a humanitarian crisis broadly referenced in mainstream discourse as "mass incarceration" and "overcriminalization"— that are the specific benefits that flow from making fair policymaking process a first-order principle in the criminal-justice reform movement?
  2021, Trevor George Gardner, “By Any Means: A Philosophical Frame for Rulemaking Reform in Criminal Law”, in Yale Law Journal Forum‎, page 800