1. closeted - Adjective
2. closeted - Verb
(informal) Not open about one's sexual orientation, romantic orientation, or gender identity.
(by extension) Not open about some aspect of one's identity, tendency, or fondness; secret.
closeted
simple past and past participle of closet
Confined.
He's spent all day closeted in his room.
sheltered; protected.
Source: en.wiktionary.orgUncompromising thought is the luxury of the closeted recluse. Woodrow Wilson
Of course I'm delighted that Fun Home has met with such success, but it still strikes me as very unlikely that an odd, cerebral story about a lesbian and her closeted gay suicidal mortician father would have struck a chord with anyone but me. Alison Bechdel
From the very beginning of this movement, Scientology has always been a very closeted organization. That aura of secrecy is something that the present-day management continues. Lawrence Wright
Everybody in the South loves the one closeted homosexual who's married. It's just too funny to not have in a movie about the South. It's an epidemic. You gotta represent! Tate Taylor
I'm a huge karaoke fan. Oh my God. I'm one of those girls who don't give the mic away. It's a problem. I'm a closeted pop star. Jenna Dewan
I don't think closeted homosexual morticians have the market cornered on self-loathing or sense of shame. Michael C. Hall