Definition of set a precedent
: to decide something that will be used as an example or rule to be followed in the future The ruling in the case is likely to set a precedent for how future cases are decided.
Is it set a precedent or set a precedence?
"Precedence" means priority or preference. It pertains to ranking. "A precedent" is a previous example used to guide a decision (often in law). "Precedents" is the plural.
What does it mean to set a precedent in court?
Precedent refers to a court decision that is considered as authority for deciding subsequent cases involving identical or similar facts, or similar legal issues. ... Precedent is generally established by a series of decisions.