fill out — complete a form
phrasal verbB1IELTS 5+neutralcommon
to write information in all the spaces on a form or document.
Say it like a native
Textbook Kindly complete the requisite documentation.
Native Just fill out the form.
'Complete the requisite documentation' is bureaucratic; 'fill out / fill in the form' is natural.
Pattern: fill out + noun (form, application, document, etc.)
In use
- You need to fill out this form before you see the doctor.daily life
- In my country, when you apply for a new passport, you have to fill out several forms with your personal information.IELTS speaking
Common mistake
✗ Please fill the form and sign it.
✓ Please fill out the form and sign it.
Need 'out' (AmE) or 'in' (BrE); bare 'fill' means make full.
Common collocations
fill out + document— the form, an application, the paperwork, a questionnaire
Don't confuse it
'Fill up' means to make something full (like a glass with water), not to complete a form.