1. in a stuffy manner; with poor air circulation or ventilation
2. in a pompous, formal, or self-important manner

Examples

• The old library smelled stuffily of dust and forgotten books.
• He spoke stuffily about proper etiquette at formal dinners.
• The room was stuffily decorated with heavy curtains and dark furniture.
• She answered stuffily, as if the question was beneath her dignity.
• The basement felt stuffily enclosed without any windows.
• The professor lectured stuffily about academic traditions.