✨📕 The NEWThe NEW Collegiate Dictionary, 12th Edition Over 5,000 words added — Buy Now! Collegiate DictionaryBuy Now!

in on

idiom

: knowledgeable about (something) or involved in (something)
They were all in on the scheme.
I let them in on our little secret.

Examples of in on in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Four-legged family members are welcome to join in on the fun (leashes required). Andy Humbles, Nashville Tennessean, 21 Nov. 2025 Now, the couple is letting fans in on more details about their private nuptials. Tabitha Parent, PEOPLE, 21 Nov. 2025 Both White and Leary said the industry has come into a moment where small brands and large brands alike can buy in on transformation. Meghan Hall, Sourcing Journal, 21 Nov. 2025 At one point, the camera slow-zooms in on the suspect’s house, while Shackleton details a stakeout. David Fear, Rolling Stone, 21 Nov. 2025 See All Example Sentences for in on

Browse Nearby Words

Cite this Entry

“In on.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/in%20on. Accessed 29 Nov. 2025.

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!