fill in

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fill in

verb fills in · filling in · filled in

  1. idiomatic, transitive To fill; to replace material that is absent or has been removed. After you're done laying the pipe, fill in the trench.
  2. idiomatic, transitive To inform somebody, especially to supply someone missing or missed information. If you know anything about this, maybe you can fill me in.
  3. idiomatic, intransitive To substitute for somebody or something. He can't go on vacation very often because there is nobody to fill in for him.
  4. UK, idiomatic, transitive To complete a form or questionnaire with requested information. I've got a form that is to be filled in in ink.

    Similar: fill out

  5. idiomatic, slang To beat up; to physically assault. Talk to me like that again and I'll fill you in!

Translations

Every language

verb to inform somebody, especially to supply someone missing or missed information

Españolinformar
Françaisrenseigner, mettre au courant
Ελληνικάσυμπληρώνω sympliróno, ενημερώνω enimeróno
Русскийдава́ть бо́лее по́лную информа́цию davátʹ bóleje pólnuju informáciju

verb to substitute for somebody or something

Españolreemplazar, remplazar, substituir
中文頂班 /顶班 dǐngbān, 代班 dàibān, 頂崗 /顶岗 dǐnggǎng
Portuguêssubstituir
Françaisremplacer
Deutschersetzen
Italianorimpiazzare
Русскийзамеща́ть zameščátʹ, замести́ть zamestítʹ

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Cite this
MLA

"fill in." Wiktionary, via Micwyn, micwyn.com/word/fill%20in. Accessed 6 Nov. 2026.

APA

fill in. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/fill%20in

Chicago

"fill in." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/fill%20in.

BibTeX
@misc{fill_in_2026,
  title = {fill in},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/fill%20in},
  urldate = {2026-11-06}
}