Well, THAT can be from the reduction of hormones after menopause, reducing lubrication and thinning the vaginal skin. Look into sexual lube, and ask your doctor if a light hormone therapy or vaginal cream would possibly be indicated for you.
If all your doctor told you is that your cervix was closed, how do you think this means you have a sealed vagina?
so l must have a sealed vagina, & was told incorrect info. ls this common, or reversible?
The normal position of a cervix is closed; the only time it opens is when it begins to dilate in preparation for childbirth. You mention "not having been in a relationship in a while" and are wondering if "this is reversible." By this context, it almost sounds like you are taking the comment about a closed cervix as being told you had a sealed vagina.
Forgive me for boring you with the obvious if you know all of this already, but the cervix is a little channel deep in the back end of the vagina that connects it to the bottom of the uterus, again, all deep inside your abdomen, not at the front opening of the vagina where a penis might go in. It has nothing to do with the ability to have sex. Ordinarily a cervix is like a shut mouth, to protect the uterus from any bacteria that might enter the vagina from the other end. If my doc told me that my cervix was closed, I would simply take it that it is not gaping wide open for some weird reason, and take it that all was normal.
A woman who has not had a child will have a cervix that looks sort of like a dot, and one who has had a child (vaginally) will have a cervix that looks more like a line. But it is not a very big opening (except during childbirth) and certainly has nothing to do with being in a relationship or not.