- (transitive) To complete a form or questionnaire with requested information.
- (intransitive) To have one's physique expand with maturity or with surplus weight.
- He began to fill out once he started college.
- (transitive, obsolete) To fill up; to make full.
- 1749, Henry Fielding, The History of Tom Jones, a Foundling. In Six Volumes, volume (please specify |volume=I to VI), London: Printed by A[ndrew] Millar, […], OCLC 928184292:
- The other lady, […] filling out a very large glass of wine, advised, and at last prevailed with her to drink it.
to complete a form
to have one's physique expand