fill in

fill someone in (on someone or something)

to tell someone the details about someone or something. Please fill me in on what happened last night. Please fill in the committee on the details.

See also: fill

fill something in 

1. to add material to an indentation, hole, etc., to make it full. You had better fill the crack in with something before you paint the wall. You should fill in the cracks first.

2. Fig. to write in the blank spaces on a paper; to write on a form. (See also Fill in the blanks) Please fill this form in. I will fill in the form for you.

See also: fill

fill in

[for an indentation, hole, etc.] to become full. The scar filled in after a few months. Will this hole in the ground fill in by itself, or should I put some dirt in?

See also: fill

fill in (for someone or something)

Fig. to substitute for someone or something; to take the place of someone or something. I will have to fill in for Wally until he gets back. I don't mind filling in.

See also: fill

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fill somebody in also fill in somebody

to give someone information that they want or need We filled her in on all the latest family news. I've asked Andy to fill in the marketing team about plans for the fall.

See also: fill

fill in (for somebody)

to do someone else's job temporarily He discovered his love of acting when he filled in for a sick friend in a college play.

See also: fill

fill in something also fill something in

1. to give written answers to questions on a computer or on paper Fill in the entire form and then click “submit.” If you have left out a date, first name, or other information, fill it in.

2. to complete a plan or idea That's the basic idea, but we still have a lot of details to fill in.

See also: fill