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
The Trojans eventually settled in on offense, but their stifling defense would have to lead the way throughout.
—
Ryan Kartje, Los Angeles Times, 20 Feb. 2026
The season 5 snippet shows Green arriving to the class late without having actually read the book, which leads her to ask Phoebe to fill her in on its complicated plot.
—Emlyn Travis, Entertainment Weekly, 19 Feb. 2026
Costco is joining in on the icon glass trend.
—Sophia Beams, Better Homes & Gardens, 19 Feb. 2026
Through context cues, Shuhari is understood as the legendary firework in question, but Shinomiya has bafflingly little interest in filling you in on what’s going on with any clarity.
—Blake Simons, IndieWire, 18 Feb. 2026
See All Example Sentences for in on
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Ryan Kartje, Los Angeles Times, 20 Feb. 2026
The season 5 snippet shows Green arriving to the class late without having actually read the book, which leads her to ask Phoebe to fill her in on its complicated plot.
—Emlyn Travis, Entertainment Weekly, 19 Feb. 2026
Costco is joining in on the icon glass trend.
—Sophia Beams, Better Homes & Gardens, 19 Feb. 2026
Through context cues, Shuhari is understood as the legendary firework in question, but Shinomiya has bafflingly little interest in filling you in on what’s going on with any clarity.
—Blake Simons, IndieWire, 18 Feb. 2026
See All Example Sentences for in on
Cite this Entry
“In on.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/in%20on. Accessed 20 Feb. 2026.
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