Prototype

Prototype. A partial or simulated approximation of the solution for the purpose of eliciting or verifying requirements with stakeholders.

Definitions

According to the BABOK Guide (3rd edition),

Prototype. A partial or simulated approximation of the solution for the purpose of eliciting or verifying requirements with stakeholders.

According to Product Manager's Handbook by Gorchels (2nd edition),

Prototype. A mock-up or preliminary version of a new product used for research purposes.