In*form"al (?), a. [Pref. in- not + formal.]

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.

 

© Webster 1913.

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