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1. A requirement of etiquette or custom
   - formality

1. A manner that strictly observes all forms and ceremonies
   "the formality of his voice made the others pay him close attention"
   - formalness
    
2. Compliance with formal rules
   "courtroom formality"

See also: formal, informal

Type of: abidance, ceremonial, ceremonial occasion, ceremony, compliance, conformation, conformity, manner, observance, personal manner

Antonym: informality

Encyclopedia: Formalities