The definition of sodomize is to perform unnatural or abnormal sexual intercourse on a person.
(verb)When you penetrate a person anally, this is an example of when you sodomize that person.
See sodomize in Webster's New World College Dictionary
transitive verb sodomized, sodomizing
Origin: sodom(y) + -ize
See sodomize in American Heritage Dictionary 4
transitive verb so·dom·ized, so·dom·iz·ing, so·dom·iz·es