An original or model after which anything is copied; the pattern of anything to be engraved, or otherwise copied, cast, or the like; a primary form; exemplar; archetype.
- An original type, form, or instance serving as a basis or standard for later stages.
- An original, full-scale, and usually working model of a new product or new version of an existing product.
- An early, typical example.
- Biology A form or species that serves as an original type or example.