fill out
phr. v..phr. v.. to write all the information needed on a document or form.
phr. v.. to complete a document by providing required information in the designated spaces; typically used for applications, surveys, or official records.
Please fill out this form with your name and address.
You need to fill out the application carefully before you submit it to the office.
The patient was requested to fill out a comprehensive medical history questionnaire prior to their initial consultation with the specialist.
In the sense of to complete a form, originally attested in American English; possibly as a calque of German ausfüllen. Later spread to British English, where it now competes with the traditional expression fill in.
commonly used with nouns like form, application, survey, or questionnaire.
contrast with 'fill in' (British English preference) and 'fill up' (used for containers like a glass or a gas tank); 'fill out' is the standard American term for documents.
I need to fill out of the form.I need to fill out the form.do not use 'of' after 'out' when using this phrasal verb with an object.