an abstract place usually conceived as having depth | the feeling that men should treat one another like brothers |
a subpopulation divided into a stratified sampling | people engaged in a particular occupation |
people having the same social, economic, or educational status | an organization of employees formed to bargain with the employer |
one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock) | the kinship relation between a male offspring and the siblings |