sit in on — to attend a meeting, class, or discussion as an observer without being an official participant
Part of speech: NOUN
Definition: to attend a meeting, class, or discussion as an observer without being an official participant
Pronunciation (IPA): /sɪt ɪn ɑːn/
Example Sentences
- The new intern was nervous to sit in on the CEO's strategy meeting.
- My mom decided to sit in on my online cooking class and ended up asking more questions than I did.
- The journalist was allowed to sit in on the peace talks but couldn't record anything.
sit in on
NOUN[/sɪt ɪn ɑːn/]
to attend a meeting, class, or discussion as an observer without being an official participant

a young professional sits quietly in a chair positioned slightly back from the main conference table, holding a notebook but not speaking. She watches attentively as the official meeting participants discuss around the table. The meeting continues with executives presenting charts and making decisions while she takes careful notes. Several suited businesspeople gesture and point at documents spread across the table during their active discussion. The observer remains respectfully silent, clearly present but not contributing to the formal proceedings. someone attending a meeting as an observer without being an official participant

Trying to sit in on the meeting, but her blazer doesn't fit and she hit the table!
Got the picture? Now let's practice.
🎤Pronunciation
🌳Etymology
Origin
This phrasal verb emerged in the 1940s from American English, combining 'sit' with 'in on' to describe participation or observation. It originated in jazz culture, where musicians would join ongoing sessions, and later expanded to mean attending meetings or classes as an observer or participant.
Breakdown
sit (to be seated, to remain) + in on (to participate in, to be part of). The phrase literally suggests being physically present while taking part in an activity, evolved from its jazz-specific meaning to broader contexts of attendance and participation.
🎵Rhyme
🔗Collocations
📝Examples
“The new intern was nervous to sit in on the CEO's strategy meeting.”
“My mom decided to sit in on my online cooking class and ended up asking more questions than I did.”
“The journalist was allowed to sit in on the peace talks but couldn't record anything.”
“I'll sit in on the Spanish class next week to see if it's worth enrolling.”
📚Related Words
Want to master 27,000+ words?
Sign up free for flashcards & quizzes.