let on

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let on

1. To reveal or disclose something, usually of a private or secret nature. If you let on that you know something about the surprise party, Mom will never stop asking you questions.
2. To feign or suggest that something is true when it isn't. We had to fire him when we learned that he had less experience than he'd let on.
See also: let, on
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

let on (to someone) (about someone or something)

to reveal knowledge about someone or something to someone. Please don't let on to anyone about what happened last night. I won't let on to anyone.
See also: let, on

let on something

to pretend something. She let on that she was a college graduate. He looked quite tired, but that wasn't how he let on.
See also: let, on

let on

(about someone or something) (to someone) to confirm or reveal something about someone or something. I won't let on about Kate. You promised you wouldn't let on about Sally and her new job! He was having money troubles, but he never let on about it to us.
See also: let, on
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

let on

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.
See also: let, on
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

let on

v.
To allow something to be known; admit or give away something: Don't let on that you know the undercover police officer.
See also: let, on
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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