What is the meaning of the word "formality"?

Definitions:

  1. a manner that strictly observes all forms and ceremonies copy to clipboard noun
    • The formality of their voice made the others pay them close attention. copy to clipboard
  2. a requirement of etiquette or custom copy to clipboard noun
    • a mere formality copy to clipboard
  3. compliance with formal rules copy to clipboard noun
    • courtroom formality copy to clipboard

Synonyms: