For me, stealth is a complex "living" definition that has various degrees and various perspectives.
I also believe it is different than "being out of the closet."
For me, stealth comes in a myriad of levels and degrees...even with me...right now.
For example, at work I am stealth
However, only the higher echelon of my Church Conference knows of my past. I voluntarily disclosed this information as part of my ordination process but there is no paper work for my denomination showing me being trans. It was only word of mouth.
For school, only the higher up administration knows. And only my closest friends knows
For my relationships, I tell those who ask me out and I have a romantic interest in.
So, stealth for me happens in various degrees. Also, I believe 100% stealth is never truly possible unless you break away from all family and friends who knew you prior to transition..and even then one hospital visit can "clock you."
But that doesn't matter to me. I am stealth in areas where I wish to be stealth.
In terms of the closet, I believe even when we are in stealth we are still out of the closet. For me, staying in the closet in a transgender language means you never make any attempts to transition.
Also, when it comes to my sexuality, I am out of the closet with this. Sexuality and Gender Identity, for me, has two different meanings of "out of the closet."
Now, I understand, there are those who are out of the closet in terms of letting the world know they are transgender. When I first started to transition I swear I thought I wanted to be the transgender poster child....but the more I had transitioned, the less those feelings were for me. However, I still say I am out of the closet because when I was in the closet, Annah was in that closet.