# let on

idiom

Source: https://englishreference.com/idiom/let-on
Updated: 2026-08-10

## Meaning

to reveal or indicate, especially unintentionally or against one's wishes

## Examples

- He didn't let on that he knew the truth.
- She kept smiling and didn't let on how upset she really was.
- Though his hands trembled slightly, he managed not to let on that he recognized the man from the photograph.

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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.