The typical example of a category of (e.g., a robin is a prototypical bird).

a combination of all the possibilities in a category of identity, a multiplicity of possible configurations, out of which the individual identity will eventually emerge

a conceptual structure, which is able to subsume most, if not all members of a linguistic category to varying degrees

an abstract, cognitive representation that reflects the best example of a category of objects or events, and it often is defined as the central tendency or the averaged members of the class of examples

The member of a category that can be seen as the “average” of that category, such as the “typical bird” or the “typical house”.

The best example of the category.

A prototype is an original type, form, or instance of some thing serving as a typical example, basis, epitome, or standard for other things of the same category.