WordWeb Online

1. 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)
    
2. People having the same social, economic, or educational status
   "the working stratum";
   - class, social class, socio-economic class
    
3. An abstract place usually conceived as having depth
   "the mind functions on many strata simultaneously";
   - level, layer

Derived forms: strata

Type of: layer, people, place

Part of: class structure, society

Encyclopedia: Stratum Stratum, Netherlands