1. the quality or state of being formal in manner, dress, or behavior; adherence to established rules or conventions
2. the quality of being official or ceremonial in nature

Examples

• The formalness of the wedding ceremony impressed all the guests.
• She appreciated the formalness of his written invitation.
• The formalness in his tone made the conversation feel awkward.
• Despite the formalness of the event, people eventually relaxed and enjoyed themselves.
• The formalness of business attire varies depending on the company culture.
• He spoke with a certain formalness that suggested he was nervous.