transitive verb. 1 : to perceive the odor or scent of through stimuli affecting the olfactory nerves : get the odor or scent of with the nose. 2 : to detect or become aware of as if by the sense of smell I smell trouble. 3 : to emit the odor of. intransitive verb. 1 : to exercise the sense of smell.
The command is compulsory for Jews. Circumcision is also practised by secular Jews and connects Jews of all tendencies, from orthodox to reform, with another. It is not only a tradition but a central part of the Jewish identity. It is of essential significance and constitutive for being a Jew.
The majority of Catholics in other parts of the world do not practice circumcision because Popes have often spoken of it being akin to mutilation, which is a sin. Protestant and non-denominational Christians generally don't practice circumcision because it serves no purpose in salvation.