is,
Any act or wickedness or crime which is against God's laws or the social duties. Injustice, dishonesty, fraud, slander, swearing, gambling, intemperance, and lewdness, are examples of immorality.

The word, 'Immorality', was used on this site in the definition of the word, 'Iniquity'.

For more on this subject, see the definitions of: Moral; Just and Justice; Temperance; Lewdness and 'Virtue'.