imperial (Adjective) — Relating to or associated with an empire. ex. "imperial colony" ex. "the imperial gallon was standardized legally throughout the British Empire"
imperial (Adjective) — Of or belonging to the British Imperial System of weights and measures.
imperial (Adjective) — Befitting or belonging to an emperor or empress. ex. "imperial palace"
imperial (Adjective) — Belonging to or befitting a supreme ruler. ex. "golden age of imperial splendour"
imperial (Noun) — A small tufted beard worn by Emperor Napoleon III.
imperial (Noun) — A piece of luggage carried on top of a coach.
imperial (Noun) — (historical) a printing-paper size measuring 30 x 22 inches.