Final answer:
Justice Felix Frankfurter defined justice in the United States primarily in terms of whether the process of enacting, administering, and enforcing laws is accessible, fair, and efficient.
Step-by-step explanation:
In the case of McNabb v. United States, Justice Felix Frankfurter primarily defined justice in the United States in terms of whether the process by which the laws are enacted, administered, and enforced is accessible, fair, and efficient. He believed that justice should be delivered in a timely manner by competent, ethical, and independent representatives and neutrals who reflect the makeup of the communities they serve.