Cis male is a term used to describe a person who was assigned male at birth and identifies as male. The term "cisgender" or "cis" is used to describe individuals whose gender identity corresponds to the sex they were assigned at birth. The prefix "cis" means "on the same side of" in Latin, while "trans" means "across from" or "on the other side of". Therefore, a cis male is someone whose gender identity is on the same side as the sex they were assigned at birth. It is important to note that being cisgender is not the same as being heterosexual, as sexual orientation is separate from gender identity.