an abstract place usually conceived as having depth | the range of interest or activity that can be anticipated |
a subpopulation divided into a stratified sampling | the line at which the sky and Earth appear to meet |
people having the same social, economic, or educational status | a specific layer or stratum of soil or subsoil in a vertical cross section of land |
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 great circle on the celestial sphere whose plane passes through the sensible horizon and the center of the Earth |