# unfounded

/ənˈfaʊndɪd/ (US) · /ʌnfˈaʊndɪd/ (UK) · CEFR C1 · Adjective

Source: https://englishreference.com/word/unfounded
Updated: 2026-05-07

## Definition

not based on facts or evidence. You use this to describe a worry, a rumor, or an idea that is not true.

For teachers: lacking a sound basis in fact or evidence. Often describes claims, fears, or allegations that have no empirical support.

## Examples

- The rumors about the company closing were completely unfounded.
- The investigation concluded that the allegations of corruption were unfounded and based on hearsay.
- Despite the widespread panic, scientific data proved that the public's fears regarding the environmental impact were largely unfounded and based on a misunderstanding of the report.

## Usage notes

- Typically used to modify nouns like 'rumors', 'fears', 'claims', or 'allegations'.

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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.