Improper or foolish conduct; folly; wrongdoing; wrong. Obsolete.

Unnatural or improper conduct.

Want of thrift or economy; neglect of thriving or doing well; †dissolute conduct, loose behaviour, impropriety.

Moral or ethical unsuitableness; unbecoming or unseemly behaviour; impropriety; with plural, an unseemly act, an impropriety, an offence. Obsolete.

= malconduct, n.

The quality of being improper. Want of accordance with good manners or decorum; unbecomingness, unseemliness, indecency; morally improper conduct.

immorality.