1. not having been tested or tried; not proven through experience or examination

Examples

• The new vaccine remains untested in children under twelve.
• She was nervous about using the untested software for such an important presentation.
• The company decided not to release the untested product to market.
• His untested theory about climate change needs more research.
• The bridge was closed because several untested sections posed safety risks.
• They hired an untested candidate who had no previous work experience.