fill in

US /fɪl ɪn/
UK /fɪl ɪn/
"fill in" picture
1.

to complete a form or document by adding information

:
•
Please fill in your name and address on the application form.
•
I need to fill in some details before submitting the report.
:
completefill outwrite in
2.

to provide someone with information they do not have

:
•
Can you fill me in on what I missed?
•
The manager will fill you in on the project details tomorrow.
:
briefupdateinform
3.

to act as a substitute for someone who is absent

:
•
I'm happy to fill in for you while you're on vacation.
•
She had to fill in for the absent teacher.
:
substitutestand indeputize
:
fillfillingfill outfill upfill lightfilling stationfill someone’s shoes