The term 'The Gay Nineties' is a phrase used to refer to the decade of the 1890s. It was a period of great economic growth and technological advancement in the United States, and it was also a time when the LGBT community began to gain more visibility and acceptance. The term 'Gay Nineties' was first used in the early 20th century as a way to describe the decade's vibrant culture and progressive attitudes. The crossword solution for this term is GAY, which is an acronym for 'Good As You'. This acronym is often used to express acceptance and support for the LGBT community.