To adjudicate is to hear and determine a legal dispute and deliver a binding decision, usually after considering evidence and legal submissions from the parties. In everyday legal practice across England and Wales, Scotland, Northern Ireland and Ireland, the term is used broadly for the exercise of judicial or quasi‑judicial decision‑making by courts, tribunals and certain decision‑makers.“Adjudicate” and “adjudication” are descriptive terms rather than precise statutory concepts, though particular procedures are defined in legislation. A key example is statutory construction adjudication (eg under the Housing Grants, Construction and Regeneration Act 1996 in the UK and the Construction Contracts Act 2013 in Ireland), where an adjudicator gives a temporarily binding decision on payment or contractual disputes.Courts frequently refer to their role in “adjudicating” issues of fact, law or jurisdiction, including in civil, criminal, administrative and insolvency proceedings. Tribunals, regulators and disciplinary bodies are also said to adjudicate complaints, appeals or claims.Across the UK and Ireland the core idea is consistent: adjudication involves an impartial decision‑maker, a defined dispute, procedural fairness, and a reasoned determination intended to resolve the matter, subject to any rights of review or appeal.