Transgender
Gender transition, expression and identity tool kit, published by CBRE, suggests: ‘Transgender (sometimes shortened to “trans”) is an umbrella term used to describe a wide range of gender identities that differ from the perceived “norms” aligned to biological sex. Transgender is a term that may be used to describe someone whose gender identity does not match their birth gender or someone who identifies as both genders, neither gender or a third gender.’
See also:
NB Stonewall suggests trans is: ‘An umbrella term to describe people whose gender is not the same as, or does not sit comfortably with, the sex they were assigned at birth. Trans people may describe themselves using one or more of a wide variety of terms, including (but not limited to) transgender, transsexual, gender-queer (GQ), gender-fluid, non-binary, gender-variant, crossdresser, genderless, agender, nongender, third gender, bi-gender, trans man, trans woman,trans masculine, trans feminine and neutrois.’
Ref https://www.stonewall.org.uk/help-advice/faqs-and-glossary/glossary-terms