fill out

[fill out] {v.} 1. To put in what is missing; complete; finish;{especially}, to complete (a printed application blank or other form)by writing the missing facts in the blank spaces; to write down factswhich are asked for in (a report or application.)

After Tom passedhis driving test he filled out an application for his driver'slicense.

The policeman filled out a report of the accident.

2. Tobecome heavier and fatter; gain weight.

When Bill was nineteen hebegan to fill out.

The girl was pale and thin after her sickness,but in a few months she filled out.