Sit in for
phrasal verb
To take another person's place or do their job for them when they are unable to do it.
John is sick today, so I'm sitting in for him at the meeting.

Often appears as...
- can you sit in for me?
- he's sitting in for the manager
phrasal verb
To replace a musician temporarily.
The pianist was late, so a member of the audience sat in for her.

Often appears as...
- she's sitting in for the drummer
- he'll sit in for the bassist
Usage tips
Colloquial
phrasal verb
To take another person's place or do their job for them when they are unable to do it.
John is sick today, so I'm sitting in for him at the meeting.

Often appears as...
- can you sit in for me?
- he's sitting in for the manager
phrasal verb
To replace a musician temporarily.
The pianist was late, so a member of the audience sat in for her.

Often appears as...
- she's sitting in for the drummer
- he'll sit in for the bassist
Usage tips
Colloquial
Definition 1 of 2

Temporary Substitute
Indicates a short-term replacement for someone, not a permanent change.

Tom will sit in for me just for today's presentation.
Willingness to Help
Shows willingness to assist by taking over someone's responsibilities.

I can sit in for you while you recover from your surgery.
Professional Context
Often used in work environments to describe covering for a colleague.

During the audit, Janet will sit in for our regular accountant.
Temporary Substitute
Indicates a short-term replacement for someone, not a permanent change.

Tom will sit in for me just for today's presentation.
Willingness to Help
Shows willingness to assist by taking over someone's responsibilities.

I can sit in for you while you recover from your surgery.
Professional Context
Often used in work environments to describe covering for a colleague.

During the audit, Janet will sit in for our regular accountant.
Temporary Substitute
Indicates a short-term replacement for someone, not a permanent change.

Tom will sit in for me just for today's presentation.
Willingness to Help
Shows willingness to assist by taking over someone's responsibilities.

I can sit in for you while you recover from your surgery.
Professional Context
Often used in work environments to describe covering for a colleague.

During the audit, Janet will sit in for our regular accountant.
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