1Indicates the first thing to do or say in a sequence; 'first (of all)' or 'to begin with', used at the start of a talk or task.
まず自己紹介をお願いします。
First, please introduce yourself.
会議を始める前に、まず今日の議題を確認しましょう。
Before starting the meeting, let's first check today's agenda.
まず宿題を終わらせてから遊びに行こう。
Let's finish our homework first, then go out to play.
2Used to express that something is highly probable—'most likely' or 'almost certainly'—as in 'まず間違いない' (almost certainly correct).
彼は用事があるから、まず来ないだろう。
He has something on, so he probably won't come.
今の人員では、その仕事はまず無理だ。
With the current staff, that job is almost certainly impossible.
この天気なら、まず雨は降らないだろう。
With weather like this, it probably won't rain.
3Indicates something is roughly acceptable or satisfactory—'more or less fine', 'on the whole reasonable'.
今月の売り上げはまず良好だ。
This month's sales are more or less good.
準備はまず整ったと言っていいだろう。
I'd say the preparations are reasonably complete now.
4Used like 'anyway' or 'for now'—marking a temporary or initial step to take before anything else, often as 'まずは'.
原因は分からないが、まずは応急処置をしよう。
We don't know the cause, but let's do a temporary fix for now.
まずは落ち着いて、状況を整理しよう。
For now, let's calm down and sort out the situation.