As used in this chapter
"action" means any civil action or proceeding brought in or appealed to any court of record which is subject to these rules;
"guardian," except where the context otherwise indicates, means the party representing the interest of a minor party in any action, whether as (a) the guardian of a minor appointed by any court of competent jurisdiction, (b) a person in the nature of a next friend selected to represent a minor plaintiff in an action, or (c) a guardian ad litem specially appointed by the court in which the action is pending;
231 Pa. Code r. 2026