1. The quality or state of being informal; lack of formality or ceremony.
Usage: Usually uncountable; plural form refers to multiple instances or types of informal behavior or situations.
2. Informal or casual acts, practices, or procedures that deviate from official rules or protocols.
Usage: Countable sense; refers to specific informal actions or breaches of formal procedure.

Examples

• The informalities of the office culture made it easy for employees to approach their managers.
• Despite the informalities in the meeting, important decisions were still made.
• She appreciated the informalities of the dinner party, where guests could dress casually.
• The contract contained several informalities that needed to be corrected before signing.
• The informalities between old friends allowed them to speak freely without worry.
• The judge noted the informalities in the court proceedings and ordered a retrial.