Definition of informality in English:

informality

noun

mass noun
  • Relaxed, friendly, or unofficial style or nature; absence of formality.

    ‘he enjoyed the informality of the occasion’
    ‘there is a laid-back informality to the food’
    • ‘Never confuse natural informality with a license for laxity.’
    • ‘The formal references made by this stood in stark contrast to Rhode's relative casualness and the informality of his performance.’
    • ‘I strongly disagreed with her on some issues but she merited respect, and her natural popularity and her informality may also show where those of us in politics may be going wrong!’
    • ‘We should not mistake informality for inefficiency, or naturalness for sloppiness.’
    • ‘He was well known for his unstuffy approach and informality, which was reflected in the funeral arrangements.’
    lack of ceremony, casualness, unceremoniousness, non-formality, unpretentiousness
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Pronunciation

informality

/ˌɪnfɔːˈmalɪti/