The story
Initialism of lesbian, gay, bisexual, transgender or transsexual, derived from earlier LGB. Attested since 1988. Used as a self-designation in United States gay rights activism since about 1990.
Etymology from Wiktionary, CC BY-SA 4.0.
lgbt
Today it means: Being lesbian, gay, bisexual, or transgender, or relating to these groups as a collective. Full definition →