Bible Dictionaries
Informal

Webster's Dictionary

(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.

Bibliography Information
Webster, Noah. Entry for 'Informal'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​i/informal.html. 1828.