Definition

Denoting or relating to a person whose sense of personal identity and gender does not correspond with their birth sex.

In other words, someone that doesn't identify as the sex they were assigned at birth.

People who are transgender experience gender dysphoria which is the discomfort living as the assigned sex. For example a trans person may feel uncomfortable when called the pronoun that corresponds with their assigned sex. (To be considered transgender you need some forms of gender dysphoria)

Types of transgender people

FtM

Female to Male: Someone who was assigned female at birth but identifies as male. Typically use He/Him pronouns

Other :

Transman, Transguy, Transboy, Trans masculine, F2M

Example:

His name is Alex, he is a Transman and he's amazing.

MtF

Male to Female: Someone who was assigned male at birth but identifies as female. Typically use She/Her pronouns

Other :

Transwoman, Transgirl , Trans feminine , M2F

Example:

Her name is Alex, she is a Transwoman and she's amazing.

Nonbinary

Someone that dose not identify as male or female. Typically use They/Them

Other :

Enby, NB, Third-gender

Example:

Their name is Alex, they're Nonbinary and they're amazing