to do somebody’s job for a short time while they are not there
- 1 (British English) to complete a form, etc. by writing information on it to fill in an application form To order, fill in the coupon on p 54.
- 2 to fill something completely The hole has been filled in.
- 3to spend time doing something while waiting for something more important He filled in the rest of the day watching television.
- 4to complete a drawing, etc. by covering the space inside the outline with colour