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(huì)里也有一種等級(jí)制度。
2. Social rank or caste, especially high rank.
   上流階層社會(huì)等級(jí)，尤指高等級(jí)
3. The caste refers to social system based on rigid distinctions of birth, rank, wealth, etc.
   社會(huì)等級(jí)是指按照血統(tǒng)，階級(jí)，財(cái)富等嚴(yán)格區(qū)分的社會(huì)制度。
4. Those poor men live in the lowest caste.
   那些窮人生活在社會(huì)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(jí)：構(gòu)成印度社會(huì)的、由無數(shù)個(gè)次等級(jí)組成的四個(gè)社會(huì)等級(jí)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(gè)世襲的、內(nèi)部通婚的次等級(jí)之一
A social class separated from others by distinctions of hereditary rank, profession, or wealth.
特權(quán)階級(jí)：通過世襲的地位、職業(yè)或財(cái)富和其他社會(huì)階層分開的一個(gè)階級(jí)

A social system or the principle of grading society based on castes.
等級(jí)制度：以種姓為基礎(chǔ)的等級(jí)社會(huì)的社會(huì)體制或原則
The social position or status conferred by a system based on castes:
社會(huì)地位：等級(jí)制度所授予的社會(huì)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(huì)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(huì)組織的昆蟲的階級(jí)：群居動(dòng)物，如螞蟻的聚居地中的一個(gè)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-