1. A schematic or preliminary plan
   "The architect presented a schema of the building project to the clients";
   - outline, scheme
    
2. An internal representation of the world; an organization of concepts and actions that can be revised by new information about the world
   "The scientist's schema of particle interactions was revised based on new experimental data";
   - scheme

Sounds like: s

Derived forms: schemata, schemas

Type of: internal representation, mental representation, plan, program [N. Amer], programme [Brit, Cdn], representation

Encyclopedia: Schema