This is the 179th most frequent Japanese word.
先
"先" means "ahead," "previous," "future," or "tip/point," depending on context.
Here, "先" is used to mean 'ahead of' or 'in front of.' It indicates a position.
彼は私の先を歩いていた。
He was walking ahead of me.
In this case, "先" denotes a temporal precedence, meaning 'first' or 'beforehand.'
来週の旅行のことについて先に話し合いましょう。
Let's discuss about next week's trip first.
Here, "先" refers abstractly to the 'future' or 'ahead,' asking if there is a direction or continuation going forward.