English Lexicon

Informal

/ɪnˈfɔːr.məl/
adjectiveCEFR B1 (Intermediate)Top #1500 frequency
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Comprehensive Definitions & Senses

2 senses
As adjective
  1. 1

    Not formal; casual or unofficial.

    "The meeting was informal, allowing everyone to speak freely."
  2. 2

    Characterized by a lack of ceremony or strictness.

    "They had an informal gathering at their home to celebrate."

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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

The word 'informal' originates from the prefix 'in-' meaning 'not' and 'formal', which comes from the Latin 'formalis', meaning 'pertaining to form'. The term evolved in the English language during the early 19th century to describe a lack of formal structure or etiquette.

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