The story
From zeroth + -ly, on the model of firstly, secondly, and so on.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: In the zeroth place; before even the first thing. Full definition →
From zeroth + -ly, on the model of firstly, secondly, and so on.
Etymology from Wiktionary, CC BY-SA 4.0.