informal

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. Source: opted

2. a. Deranged in mind; out of one's senses. Source: opted

3. adj. not formal Source: wordnet

4. adj. not officially recognized or controlled Source: wordnet

5. adj. used of spoken and written language Source: wordnet

6. adj. having or fostering a warm or friendly and informal atmosphere Source: wordnet

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. Source: webster

8. j:100 a. not formal s. not officially recognized or controlled a. used of spoken and written language Source: ecdict

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