sit in with
C1 neutral inseparable transitive
In simple words
to join another group for a short time
Literal meaning: to sit among a group
Meanings
1 C1
idiomatic
neutral
to join a group temporarily, especially to perform with them
"A jazz pianist sat in with the band for the final set."
"He sat in with the band."
— Common music journalism phrasing; exact source not recalled
Grammar: inseparable
Usage notes
Most often used in music and performance contexts. It is fairly specialized and not common in everyday conversation.
Commonly used with
band group musicians show broadcast session
Forms
Base
sit in with
I/you/we/they
3rd person
sits in with
he/she/it
Past simple
sat in with
yesterday
Past participle
sat in with
have + pp
-ing form
sitting in with
continuous
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Synonyms
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