What is another word for sit in?
Pronunciation: [sˈɪt ˈɪn] (IPA) 
When someone "sits in" on a meeting or class, they are observing or participating without being an official member. Some synonyms for "sit in" include attending, observing, monitoring, listening, and participating. To "attend" a meeting or class implies a deliberate decision to be present, while "observing" suggests a more passive role of watching. "Monitoring" connotes a more active role of keeping track of what is happening. "Listening" implies a focus on hearing what is being said. Finally, "participating" suggests an active role in the discussion or activity. Regardless of the specific word used, the key idea behind "sit in" is that someone is present without being an official member.
