sit in on
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
To attend a private meeting or class without participating.
Where it’s used:
Used
American English
Examples
Parents of younger children often become upset when they are told that they cannot sit in on the psychological assessment.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “sit in on” mean?
To attend a private meeting or class without participating.
Is “sit in on” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.