Dictionary.com

let in on

Save This Word!

Allow someone to know about or participate in something, as in I'm going to let you in on a little secret. This idiom was first recorded in 1904.

QUIZ
GOOSES. GEESES. I WANT THIS QUIZ ON PLURAL NOUNS!
Test how much you really know about regular and irregular plural nouns with this quiz.
Question 1 of 9
Which of the following nouns has an irregular plural form?
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

How to use let in on in a sentence

FEEDBACK