RhymeZone: lgbt definitions

Definitions of LGBT:

adjective: Being lesbian, gay, bisexual, or transgender, or relating to these groups as a collective.
noun: (chiefly in the plural, nonstandard) A member of the LGBT community.
noun: Alternative letter-case form of LGBT [(chiefly in the plural, nonstandard) A member of the LGBT community.]

(Definitions from Wiktionary)