The UPSC defines merit in civil service appointments through a comprehensive evaluation process encompassing various aspects such as examination performance, interviews, and eligibility criteria. Candidates are assessed based on their knowledge, critical thinking, and ability to handle complex scenarios. Additionally, the role of reservation policies also intertwines with the concept of merit, where UPSC ensures a fair opportunity for all candidates while maintaining a high standard of competence. Thus, merit in UPSC is not solely based on scores but extends to holistic attributes vital for effective public administration.