to complete a form, etc. by writing information on it
Example:
- to fill in an application form
- To order, fill in the coupon on p 54.
to fill something completely
Example:
- The hole has been filled in.
to spend time doing something while waiting for something more important
Example:
- He filled in the rest of the day watching television.
to complete a drawing, etc. by covering the space inside the outline with colour