Parol Evidence Rule Legal Meaning and Definition

Here is a simplified definition of the legal term Parol Evidence Rule.

Parol Evidence Rule (noun):

The Parol Evidence Rule is a legal principle in contract law that prevents any extraneous or external oral (/parol/) or written testimonies from altering, contradicting, or adding to the terms of an already established and complete written contract. This rule is used to uphold the integrity of written agreements and reinforces that any significant agreements should be included in the final written contract.