# one's lips are sealed

idiom

Source: https://englishreference.com/idiom/ones-lips-are-sealed
Updated: 2026-08-10

## Meaning

One will not tell anyone else; one is keeping a secret.

## Examples

- Don't worry, my lips are sealed about your secret.
- I know you want to know who won the award, but my lips are sealed until the ceremony.
- Although the detective pressed him for details regarding the incident, the witness remained firm, insisting that his lips were sealed.

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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.