卓著 (zhuó zhù) is an adjective meaning 'outstanding' or 'remarkable', typically describing achievements, results, or qualities that are exceptionally impressive and widely recognized. The character 卓 (zhuó) means 'eminent' or 'lofty', suggesting superiority and distinction; 著 (zhù) means 'prominent' or 'well-known', emphasizing visibility and reputation. Together, they form a compound that conveys both high quality and broad acknowledgment—often used in formal or written contexts such as academic reports, official commendations, or medical summaries.

This term is rarely used in casual speech and almost never with people directly (e.g., you wouldn’t say 'he is 卓著'); instead, it modifies abstract nouns like 成就 (achievements), 疗效 (therapeutic effect), or 贡献 (contributions). It carries a respectful, elevated tone and frequently appears in professional, scientific, or governmental discourse where measurable excellence is highlighted.