広こう博はくMeanings1noun, na-adjectivevast knowledge; extensive learningDescribes a person's deep and wide-ranging knowledge or scholarship. Often used in formal or written contexts.彼かれは広こう博はくな知ち識しきを持もっている。He has vast knowledge.その教きょう授じゅの広こう博はくな学がく識しきには驚おどろかされる。I am amazed by the professor's extensive scholarship.