Closeted and in the closet are adjectives for lesbian, gay, bisexual, transgender etc. (LGBT) people who have not disclosed their sexual orientation or gender identity and aspects thereof, including sexual identity and sexual behavior. It can also be used to describe anyone who is hiding part of their identity because of social pressure.
In late 20th-century America, the closet had become a central metaphor for grasping the history and social dynamics of gay life. The notion of the closet is inseparable from the concept of coming out. The closet narrative sets up an implicit dualism between being "in" or being "out". Those who are "in" are often stigmatized as living false, unhappy lives. However, though many people would prefer to be “out” of the closet, there are numerous social, economic, familial, and personal repercussions that lead to them remaining, whether consciously or unconsciously, “in” the closet. The decision to come out or remain in the closet is considered a deeply personal one, and outing remains controversial in today’s culture.
In the 21st century, the related concept of a "glass closet" emerged in LGBT discourse. This term describes public figures, such as entertainers or politicians, who are out of the closet in their personal lives and do not engage in the tactics (such as entering a lavender marriage or publicly dating a person of the opposite sex as a "beard") that were historically used by closeted celebrities to disguise their sexual identity, but have not formally disclosed their sexual orientation on the public record — and who, thus, are technically neither fully in the closet nor fully out of it.
In the early stages of the lesbian, gay or bisexual identity development process, people feel confused and experience turmoil. In 1993, Michelangelo Signorile wrote Queer in America, in which he explored the harm caused both to a closeted person and to society in general by being closeted.