Lastly is defined as finally or happening after everything else.
The words you say before the last point mentioned in a speech is an example of lastly; "and lastly..."
in conclusion; finally
- (sequence) Used to mark the beginning of the last in a list of items or propositions.
- Firstly, that's illegal; secondly, it has serious disadvantages; thirdly, it's not necessary; and lastly, did I mention that it's illegal?
- (discourse marker) Used to signal that the speaker is about to yield control of the conversation.
From last +"Ž -ly.