- a person or thing that fills in, as a substitute, replacement, or insertion: The company used a fill-in for workers on vacation.
- a brief, informative summary; a rundown.
- to complete (a form, drawing, etc)
- to act as a substitute
- to put material into (a hole or cavity), esp so as to make it level with a surface
- to inform with facts or news
- to attack and injure severely
- a substitute
- a briefing to complete one's understanding
