We found 2 dictionaries that define the word let someone in on something:

General (1 matching dictionary)

1. let someone in on something: Merriam-Webster

Miscellaneous (1 matching dictionary)

2. let someone in on something: Idioms

▸ Words similar to let someone in on something ▸ Usage examples for let someone in on something ▸ Idioms related to let someone in on something ▸ Wikipedia articles (New!) ▸ Words that often appear near let someone in on something ▸ Rhymes of let someone in on something ▸ Invented words related to let someone in on something