名詞 caste:

1. social status or position conferred by a system based on class
2. (Hinduism) a hereditary social class among Hindus; stratified according to ritual purity
3. a social class separated from others by distinctions of hereditary rank or profession or wealth

1. I suppose you also have a caste system in your society.
   我想你們的社會里也有一種等級制度。
2. Social rank or caste, especially high rank.
   上流階層社會等級，尤指高等級
3. The caste refers to social system based on rigid distinctions of birth, rank, wealth, etc.
   社會等級是指按照血統(tǒng)，階級，財富等嚴(yán)格區(qū)分的社會制度。
4. Those poor men live in the lowest caste.
   那些窮人生活在社會的最低階層。

caste

n.（名詞）

Any of four classes, comprising numerous subclasses, constituting Hindu society.
印度的世襲等級：構(gòu)成印度社會的、由無數(shù)個次等級組成的四個社會等級之一
Any of numerous hereditary, endogamous social subclasses stratified according to Hindu ritual purity.
種姓：根據(jù)印度教儀式的純潔性劃分的無數(shù)個世襲的、內(nèi)部通婚的次等級之一
A social class separated from others by distinctions of hereditary rank, profession, or wealth.
特權(quán)階級：通過世襲的地位、職業(yè)或財富和其他社會階層分開的一個階級

A social system or the principle of grading society based on castes.
等級制度：以種姓為基礎(chǔ)的等級社會的社會體制或原則
The social position or status conferred by a system based on castes:
社會地位：等級制度所授予的社會地位：
例句：
lose caste by doing work beneath one`s station.
由于做低于自己身份的工作而喪失社會地位

A specialized level in a colony of social insects, such as ants, in which the members, such as workers or soldiers, carry out a specific function.
有社會組織的昆蟲的階級：群居動物，如螞蟻的聚居地中的一個特殊階層，其成員如工蟻或兵蟻在其中發(fā)揮特殊的作用

來源：
Spanish casta [race]
西班牙語 casta [種族]
Portuguese casta [race, caste] [both from feminine of] casto [pure]
葡萄牙語 casta [種族，種姓] [] 兩者皆源自casto的陰性詞 [純潔的]
from Latin castus * see kes-
源自 拉丁語 castus *參見 kes-