adverb
- used to introduce the first point in a series or list
Usage: formal
Examples
- Firstly, we need to gather all the necessary materials.
- There are three reasons I disagree: firstly, the cost is too high.
- Firstly, let me thank everyone for coming today.
- The plan has several problems: firstly, it’s too expensive.
- Firstly, we should consider the environmental impact.
- I have two main concerns: firstly, the timeline seems unrealistic.