庙宇 (miào yǔ) is a formal, literary noun meaning 'temple'—specifically referring to a traditional Chinese religious architectural compound, often associated with Buddhism, Daoism, or folk religion. The character 庙 (miào) originally meant 'ancestral hall' or 'shrine', while 宇 (yǔ) means 'roof', 'eaves', or by extension 'building' or 'structure'. Together, they evoke the image of a sacred building complex with courtyards, halls, and pavilions—not just a single room or modern structure.

This term emphasizes architectural grandeur and historical/cultural significance; it’s commonly used in writing, travel descriptions, historical texts, and cultural discussions. It’s more formal and poetic than the simpler word 寺 (sì, 'Buddhist temple') or 庙 (miào) alone, and rarely appears in casual speech. You’ll encounter it in phrases like '古庙宇' (ancient temples) or '名胜古迹中的庙宇' (temples among famous scenic and historic sites).