A claim is the assertion of a legal right to a remedy, made against another person or body, typically seeking court-ordered relief such as damages, an injunction, specific performance, or a declaration. In practice it refers both to the underlying cause of action (the facts and legal basis) and the formal step of commencing civil proceedings, as well as pre‑action demands and notifications to insurers or insolvency office-holders.In England and Wales, the Civil Procedure Rules use “claim” widely (including petitions) and proceedings are started by a claim form under Part 7 (substantial disputes of fact) or Part 8 (primarily legal issues). Related terms include counterclaim and Part 20 claim (additional claims against existing or third parties), and “claimant” is the party bringing the claim.Usage is broadly consistent across the UK and Ireland, though initiating documents differ:- Scotland: practitioners speak of “claims”, but court actions are “raised” (e.g., summons in the Court of Session, initial writ in the sheriff court; “claim form” in Simple Procedure). Parties are pursuer and defender.- Northern Ireland: proceedings commence by writ of summons (High Court) or civil bill (County Court); “plaintiff” remains common.- Ireland: proceedings commence by plenary summons, special summons, civil bill, or personal injuries summons; PIAB claims and insurance claims use “claim” descriptively.In insolvency, “claim” commonly means a proof of debt.