In·for·mal·i·ty n.; pl. Informalities
1. The state of being informal; lack of regular, prescribed, or customary form; as, the informality of legal proceedings.
2. An informal, unconventional, or unofficial act or proceeding; something which is not in proper or prescribed form or does not conform to the established rule.
n 1: a manner that does not take forms and ceremonies seriously
2: freedom from constraint or embarrassment; "I am never at
ease with strangers" [syn: ease]