No not at all. We only look outside our Constitution to determine definitions of phrases in the Constitution that are ambiguous.
You’re shockingly ignorant here. Our entire legal system from top to bottom is at its foundation a common law legal system. Contracts. Torts. Court procedures. Real Property. Even our constitutional law starts with a very small set of works and then builds on that using the common law system where judges create various doctrines that then form precedents and govern other cases.