sinnoun [ C or U ]uk /sɪn/ us /sɪn/
He thinks a lot about sin.
[ + to infinitive ] informal I think it's a sin (= is morally wrong) to waste food, when so many people in the world are hungry.
- Roman Catholics go to confession to purge their souls from sin.
- He wanted to confess his sins before he died.
- She may have committed several sins, but greed was not among them.
- They are guilty of the sin of neglect.
- I think it's a sin to hit children.
adjective uk /ˈsɪn.ləs/ us /ˈsɪn.ləs/