Phrasal verb
fill out
Irregular verb
Forms
Infinitive
fill out
Past
filled out
Past participle
filled out
Definitions
01to complete a form
A2 · Elementary American English
phr.v. to write all the necessary information in the spaces on a document or form.
phr.v. to complete a document or questionnaire by providing requested information in the designated spaces. Transitive; in British English, 'fill in' is more common.
日本語:書き込む※
“Please fill out this registration form before you see the doctor.”
“The HR department requested that all new employees fill out the insurance paperwork before the end of their first week.”
Pitfall
I need to fill out of this application.
I need to fill out this application.
Do not use 'of' after 'fill out'. The verb takes the form as a direct object.
02to become larger or rounder
B2 · Upper Intermediate
phr.v. to become larger, heavier, or more developed in your body shape.
phr.v. to become more rounded or muscular in physique, often due to physical maturity or weight gain. Intransitive; often used to describe a teenager growing into an adult body.
“He was very thin as a child, but he started to fill out in his late teens.”
“After a summer of intensive weight training and a high-calorie diet, the athlete began to fill out, gaining significant muscle mass in his shoulders.”
Antonyms
Teaching tip
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.
Etymology
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.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Phrasal verb
Particles
out
Separability
optional
Pattern
fill + out + object
Synonyms
Antonyms
Grammar
- Exam level
- CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.A2 KeyIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.3.0–4.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 2.0–2.524–43TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.225–549
- Level
- A2 · ElementaryOxford
- Updated
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QR code
englishreference.com/q/fill-out
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「日本語」 data: JMdict (EDRDG), CC BY-SA 4.0