hothouse (Noun) — A greenhouse in which plants are arranged in a pleasing manner.
hothouse (Noun) — Somewhere that provides an environment for rapid development. ex. "a hothouse for innovative ideas" ex. "the continent has become a hothouse for the emergence of extremist groups"
hothouse (Verb) — Provide (a child) with high-level teaching at an early age. ex. "I was hothoused as a child and reading very well by the age of 3"