thirdly
adv. sent. B2 Upper Intermediate US //ˈθɝdɫi// UK //θˈɜːdli// third·ly
adv. used to introduce the third point or reason in a list. You use it when you are explaining several things in order.
adv. introduces the third item in a sequence or the third point in an argument. Often used to structure formal writing or speeches.
Thirdly, we must consider the cost of the project.
Firstly, the plan is too expensive; secondly, it is impractical; and thirdly, it lacks public support.
The report argues that the policy is flawed because it ignores local needs, lacks clear oversight, and thirdly, fails to address the underlying economic causes of the crisis.
Usage
Typically placed at the beginning of a sentence or clause to signal a transition.