let on

British  

verb

1. to allow (something, such as a secret) to be known; reveal

   he never let on that he was married

2. (tr) to cause or encourage to be believed; pretend

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let on Idioms  

1. Reveal one's true feelings or a fact, allow something to be known, as in Don't let on that you met her before . This usage is probably a shortening of let it on someone . [c. 1700]

2. Pretend, as in He let on that he was very angry, but in fact he didn't care a bit . [First half of 1800s] Also see let in on .

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Example Sentences

See Examples For:

let on

The total cost to train and run DeepSeek’s model was exponentially higher than the company let on, and investors failed to consider that businesses generally wouldn’t use Chinese models due to security concerns.

From Barron's ● Feb. 4, 2026

She does let on that the team looked at "some very innovative ways" to get Paddington moving, but says traditional puppetry was ruled out.

From BBC ● Nov. 1, 2025

Each was a genius in his way and they were on friendlier terms than they let on.

From Los Angeles Times ● Sep. 4, 2025

If the no vote of his former ally in McConnell fazed him, the president didn't let on.

From Salon ● Jan. 25, 2025

A lot of times, I believe I did, and that my dad’s book was more about me than he’d ever let on.

From "100 Sideways Miles" by Andrew Smith