# untested

/ənˈtɛstɪd/ (US) · /ʌntˈɛstɪd/ (UK) · CEFR B2 · Adjective

Source: https://englishreference.com/word/untested
Updated: 2026-05-20

## Definition

not having been tried or tested yet. You use this to describe something that is new and might not work perfectly.

For teachers: not having been subjected to a trial or examination. Often used to describe theories, products, or methods that lack a proven track record.

## Examples

- The new software is still untested and may have bugs.
- The team is hesitant to launch the untested vaccine without more data on its long-term effects.
- While the theory is promising, it remains untested in a real-world environment where variables are far more complex than in a controlled laboratory setting.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.