Firstly definition

fûrstlē
In the first place; to begin with; first.
adverb
1
0
In the first place; first.
adverb
1
0
(formal) In the first place; before anything else; first.
adverb
0
0
Advertisement

Origin of firstly

  • Coined between 1525 and 1535 from first +‎ -ly.

    From Wiktionary