fill out

Meanings

1. To complete a form or questionnaire with requested information.
2. To have one's physique expand with maturity or with surplus weight.
3. To fill up; to make full.
4. Used other than figuratively or idiomatically: see fill, out.

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.