trans ‧ sex ‧ u ‧ al /trænˈsekʃuəl $ trænsˈsek-/ BrE AmE noun [countable]
a man who wants to be a woman and has medical treatment to make him into one, or a woman who wants to be a man and has medical treatment to make her into one ⇨ transvestite
—transsexual adjective
—transsexualism noun [uncountable]