informality
nounThe state or quality of being informal.
nounAn informal act.
nounThe state of being informal; want of regular or customary form; an informal act or procedure: as, the informality of legal proceedings may render them void.
nounThe state of being informal; lack of regular, prescribed, or customary form.
nounAn informal, unconventional, or unofficial act or proceeding; something which is not in proper or prescribed form or does not conform to the established rule.
nounThe condition of being
a manner that does not take forms and ceremonies seriously
nounfreedom from constraint or embarrassment