Antonyms of noun informality

1 of 2 senses of informality

Sense 1
informality -- (a manner that does not take forms and ceremonies seriously)
       Antonym of formality (Sense 2)
      => formality, formalness -- (a manner that strictly observes all forms and ceremonies; "the formality of his voice made the others pay him close attention")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun informality

2 senses of informality

Sense 1
informality -- (a manner that does not take forms and ceremonies seriously)
       => manner, personal manner -- (a way of acting or behaving)

Sense 2
ease, informality -- (freedom from constraint or embarrassment; "I am never at ease with strangers")
       => naturalness -- (the quality of being natural or based on natural principles; "he accepted the naturalness of death"; "the spontaneous naturalness of his manner")