· 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)
Hypernym(s): layer
· people having the same social, economic, or educational status; "the working class"; "an emerging professional class"
Synonym(s): class, social_class, socio-economic_class
Hypernym(s): people
· an abstract place usually conceived as having depth; "a good actor communicates on several levels"; "a simile has at least two layers of meaning"; "the mind functions on many strata simultaneously"
Hypernym(s): place
· a subpopulation divided into a stratified sampling
Hypernym(s): subpopulation