a term used to describe a homosexual person who has not told anyone of his/her sexual orientation

A person that is secretly gay.

Someone who has a different orientation or gender identity than typical and has not yet shared with the rest of the world

Gay man in denial.

to be a gay, lesbian, bi or queer person who hides their true sexual orientation from the public and those around them. often for fear of persecution, rejection, others' reactions, but not always for negative reasons. some would just as soon not come out or see no reason to.

(adj) Describing an aspect that one keeps rather private or completely secret, usually due to fear of social rejection. Commonly used in reference to homosexuality, but not exclusively.

Tom Cruise's home.