an abstract place usually conceived as having depth | the content of a particular field of knowledge |
a subpopulation divided into a stratified sampling | people in general; especially a distinctive group of people with some shared interest |
people having the same social, economic, or educational status | (mathematics) the set of values of the independent variable for which a function is defined |
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) | territory over which rule or control is exercised |
| a particular environment or walk of life |