Definition
to perceive an individual as representing a specific type or category of person
认定为…人（视…为…）
Although he was quite young at the time, some of his actions marked him down as a mature individual.
尽管他当时还很年轻，但他的一些行为让人认为他是个成熟的人。
Based on her experience, we marked her down as the expert of the team.
根据她的经验，我们将她视为团队中的专家。
His style of dress marked him down as an artist.
他的穿衣风格让人认为他是个艺术家。