fill in

Definition

Verb (transitive):
- To complete a form or document by writing the required information in the blank spaces: The core meaning involves adding missing details to make something whole or complete.
- To act as a temporary replacement for someone: To perform the duties of another person during their absence.
- To inform someone thoroughly about something they have missed: To provide detailed information to bring someone up to date.
- To represent the effect of shading in a drawing: To add color or tone to an area, especially to show shadow.

Usage and Examples

Completing a form:
- Please fill in your name and address on the application.
- I need to fill in this tax return before the deadline.
Acting as a substitute:
- Can you fill in for me at the meeting tomorrow? I'm unwell.
- She filled in as the lead singer when the regular performer lost her voice.
Informing someone:
- I missed the briefing. Could you fill me in on what was discussed?
- He filled us in on all the office gossip.
Adding shading (art/drawing):
- The artist filled in the background with a light blue wash.
- Use this pencil to carefully fill in the shadowed areas.

Advanced Usage and Nuances

"Fill in the blanks": A common phrase meaning to provide missing information, often used literally for exercises or figuratively.
- This exercise asks you to fill in the blanks with the correct verb tense.
- I can guess part of the story, but you'll have to fill in the blanks.
"Fill in time": To do something to occupy time while waiting.
- I read a magazine to fill in time before my appointment.

Variants and Related Words

Fill-out (phrasal verb): Often used interchangeably with "fill in" when referring to completing forms. (e.g., )
Substitute (verb/noun): A direct synonym for the replacement meaning.
Brief (verb): A synonym for the informing meaning.
Shade (verb): A synonym for the drawing meaning.

Synonyms

Related Phrasal Verbs

Fill up: To make something completely full (often with liquid or a container).
- I need to fill up the car with gas.
Fill out: (1) To complete a form (similar to "fill in"). (2) To become fuller or rounder in shape.
- Please fill out this application.
- He has filled out a lot since he started weight training.

Related Idioms

"Fill someone's shoes": To take over someone's role or duties, especially when they are difficult to replace.
- Who will be able to fill in for the manager? It's hard to fill her shoes.
"A fill-in" (noun): A person or thing that acts as a temporary substitute.
- She worked as a fill-in while the secretary was on maternity leave.

Verb

write all the required information onto a form
- fill out this questionnaire, please!
- make out a form
be a substitute
- The young teacher had to substitute for the sick colleague
- The skim milk substitutes for cream--we are on a strict diet
represent the effect of shade or shadow on
supply with information on a specific topic
- He filled me in on the latest developments

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