Find the word definition

Wiktionary
trans man

alt. A female-to-male transgender or transsexual person. n. A female-to-male transgender or transsexual person.

Wikipedia
Trans man

A trans man (sometimes trans-man or transman) is a transgender person who was assigned female at birth but whose gender identity is that of a man. The label of transgender man is not always interchangeable with that of transsexual man, although the two labels are often used in this way. Transgender is an umbrella term that includes different types of gender variant people (including transsexual people). Many trans men choose to undergo surgical or hormonal transition, or both (see sex reassignment therapy), to alter their appearance in a way that aligns with their gender identity more appropriately or alleviates gender dysphoria.

Although the literature indicates that trans men more commonly identify as heterosexual, trans men may identify as homosexual, gay, bisexual, pansexual, polysexual, asexual, demisexual, etc., and some trans men consider conventional sexual orientation labels inadequate or inapplicable to them.