Tribe is sometimes used to refer to a group of people of the same race, language, and customs, especially in a developing country. Some people disapprove of this use.
例句
...three-hundred members of the Xhosa tribe.300 名科萨族人…a map of Maryland marked with the names of Indian tribes.标有印第安部落名称的马里兰州地图
N-COUNT-COLL
(从事相同活动或行为相同的)一伙(人)，一帮(人)
You can use tribe to refer to a group of people who are all doing the same thing or who all behave in the same way.
例句
...tribes of talented young people.一群群才华出众的年轻人…the particularly unpleasant tribe who argue over the splitting of restaurant and bar bills.那帮为分摊吃喝账单而争吵的令人非常讨厌的家伙
英汉词典释义
n.
部落, 种族
America was once the home of many Indian tribes.美洲曾经是许多印第安部落的故土。
英英词典释义
Noun
1. a social division of (usually preliterate) people
2. a federation (as of American Indians)
3. (biology) a taxonomic category between a genus and a subfamily