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Thesaurus: informal

Not in the regular, usual, or established form; not according to official, conventional, prescribed, or customary forms or rules; irregular; hence, without ceremony; as, an informal writting, proceeding, or visit.

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Definitions

  1. a. Not in the regular, usual, or established form; not according to official, conventional, prescribed, or customary forms or rules; irregular; hence, without ceremony; as, an informal writting, proceeding, or visit.
  2. a. Deranged in mind; out of one's senses.
  3. adj. not formal
  4. adj. not officially recognized or controlled
  5. adj. used of spoken and written language
  6. adj. having or fostering a warm or friendly and informal atmosphere
  7. 1. Not in the regular, usual, or established form; not according to official, conventional, prescribed, or customary forms or rules; irregular; hence, without ceremony; as, an informal writting, proceeding, or visit. 2. Deranged in mind; out of one's senses. [Obs.] These poor informal women. Shak.
  8. j:100 a. not formal s. not officially recognized or controlled a. used of spoken and written language