# unbeknownst

/ənbiˈnoʊnst/ (US) · /ʌnbɪnˈəʊnst/ (UK) · CEFR C1 · Adjective

Source: https://englishreference.com/word/unbeknownst
Updated: 2026-05-27

## Definition

something that happens without someone knowing about it. You use this to describe a secret or a hidden fact that someone is not aware of.

For teachers: something that occurs or exists without the knowledge of a specific person. Typically used in the prepositional phrase 'unbeknownst to' followed by a noun phrase.

## Examples

- Unbeknownst to the team, the game was cancelled.
- Unbeknownst to the local residents, the city council had already approved the new development project.
- Unbeknownst to the protagonist, the seemingly minor decision to take a different route home would set in motion a series of events that would change his life forever.

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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.