Trans people:

Adjective used to refer to people whose identity and / or gender expression does not correspond to social norms and expectations traditionally associated with their sex assigned at birth. This term includes: Transgender and Transsexual People.

Transgender:

Adjective used to refer to a diverse group of people whose gender identities differ in varying degrees of sex they were assigned at birth, but they have not altered or who do not want to change the primary sexual characters with which they were born.

Transsexuals:

Adjective (often applied by the medical profession) to describe people who seek to change or have changed their primary sexual characters and / or secondary sex characteristics through medical interventions (hormones and / or surgery) to feminize or masculinized. These interventions usually are accompanied by a permanent change in gender roles.