adjective / adverb / noun
last
LAST/lˈæst/
Coming after the other members of a sequence.
The last runner crosses the finish line as the others wait.

Etymology
Latost was the superlative of the word behind late: the slowest or latest. The sense developed into the final position, following all others in a sequence.
In context
and then my last question I know we're running right up on time
More examples
- Please add the cheese last.
- She is the last to leave the office.
- Our last meeting ended early.
Forms
last
lastly adverb — After everything else in a sequence.