As a Noun: 1. The operation in which the loose skin at the end of a man's or boy's penis is cut off for religious or medical reasons. English = circumcision. 2. The penis of a man or boy in which the loose skin at the end has been cut off. English = circumcised penis. As a Verb or Adjective: 1. To cut off the loose skin at the end of a boy's or man's penis for religious or medical reasons. English = circumcise. 2. To have a penis in which the loose skin at the end has been cut off for religious or medical reasons. English = (be) circumcised.