someone who adopts the dress or manner or sexual role of the opposite sex.
A male or female who likes to dress in clothing normally reserved for the opposite sex.
a person who enjoys wearing the clothes of the opposite sex
Someone who on occasion wears what is currently considered the clothes of the other sex(es) to relieve gender discomfort. Cross-dressers want to appear as "convincing as possible as their other selves. A large subset of this group are men who enjoy dressing as women, and have otherwise ordinary marriages with wives who are not transgendered. Many say this term is preferable to transvestite, which means the same thing.
A person who wears the apparel of the opposite sex.