Noun. 1: The best position or best person. Example: the top job in the company or the top of the class. 2: at the highest level of something. Example: Tony is at the top of his game. 3: at the highest intensity of something. He sang at the top of his voice. Adjective. 1: Most successful. Example: He is amongst the top academics in the country. 2: of the finest or best quality. Example: one of the top restaurants. 3: very good or excellent. Example: Tony such a top guy.