a person born during the period 22 November to 22 December, who is believed to be influenced by the zodiac sign Sagittarius

She was a Sagittarian, open and naive. 她是人马座人，率直又天真。

belonging or relating to the zodiac sign Sagittarius (= the sign for people born from 22 November to 22 December)

You have typical Sagittarian flair and warmth. 你拥有人马座人典型的特质和热忱。

I'm Sagittarian, optimistic, enthusiastic. 我是人马座人，乐观而热情。