Latin for “to stand by things decided.” Stare decisis is essentially the doctrine of precedent. Courts cite to stare decisis when an issue has been previously brought to the court and a ruling already issued. Generally, courts will adhere to the previous ruling, though this is not universally true. See, e.g., Planned Parenthood of Southeastern Pennsylvania v. Casey, 505 US 833 (1992). See also Jurisprudence.