fill out

verb

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.

1. To complete a form or questionnaire with requested information.

   “Please fill out this application if you are interested in the job.”

2. To have one's physique expand with maturity or with surplus weight.

   “He began to fill out once he started college.”

   “We've scoured these science and tapped the top experts to help you learn how to do just that. Use these seven simple strategies, and you'll fill up without filling out.”

3. To fill up; to make full.

   “The other lady, […] filling out a very large glass of wine, advised, and at last prevailed with her to drink it.”

4. Used other than figuratively or idiomatically: see fill, out.