Simple Definition of sinful
: wrong according to religious or moral law
: very bad or wicked
: extremely enjoyable in a way that makes you feel guilty
Examples of sinful
It is sinful to steal.
<chastised by his minister for his sinful behavior>
Before 12th Century
First Known Use of sinful
before 12th century
Seen and Heard
What made you want to look up sinful? Please tell us where you read or heard it (including the quote, if possible).