an abstract place usually conceived as having depth | a major social class or order of persons regarded collectively as part of the body politic of the country (especially in the United Kingdom) and formerly possessing distinct political rights |
a subpopulation divided into a stratified sampling | |
people having the same social, economic, or educational status | |
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) | |