Circumcision is amputation of the foreskin of a male or the clitoral hood of a female to reduce sexual sensation. The New Testament of the Bible specifically forbids it.
Circumcision is the removal of the foreskin from the penis. It is primarily cosmetic, although it also helps with hygiene and may help reduce the risk of some cancers.
Circumcision is a minor medical procedure done on infant males to shape the head of their penis. It has religous origins to Abraham in the Old Testament but is also considered standard procedure for health reasons for many young males.