Describes a person who is not open about his or her sexual orientation or gender identity. Better to simply refer to someone as not out about being lesbian, gay, bisexual, or transgender. Some individuals may be out to some people in their life, but not out to others due to fear of rejection, harassment, violence, loss of job or other concerns. Some individuals may be out to some people in their life, but not out to others due to fear of rejection, harassment, violence, loss of job or other concerns.
See coming out, outing.
REFERENCE: GLAAD Media Reference Guide-10th Edition